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* object.h (Relobj::local_symbol_value): New function.
[deliverable/binutils-gdb.git] / gold / sparc.cc
1 // sparc.cc -- sparc target support for gold.
2
3 // Copyright 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
4 // Written by David S. Miller <davem@davemloft.net>.
5
6 // This file is part of gold.
7
8 // This program is free software; you can redistribute it and/or modify
9 // it under the terms of the GNU General Public License as published by
10 // the Free Software Foundation; either version 3 of the License, or
11 // (at your option) any later version.
12
13 // This program is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 // GNU General Public License for more details.
17
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
21 // MA 02110-1301, USA.
22
23 #include "gold.h"
24
25 #include <cstdlib>
26 #include <cstdio>
27 #include <cstring>
28
29 #include "elfcpp.h"
30 #include "parameters.h"
31 #include "reloc.h"
32 #include "sparc.h"
33 #include "object.h"
34 #include "symtab.h"
35 #include "layout.h"
36 #include "output.h"
37 #include "copy-relocs.h"
38 #include "target.h"
39 #include "target-reloc.h"
40 #include "target-select.h"
41 #include "tls.h"
42 #include "errors.h"
43 #include "gc.h"
44
45 namespace
46 {
47
48 using namespace gold;
49
50 template<int size, bool big_endian>
51 class Output_data_plt_sparc;
52
53 template<int size, bool big_endian>
54 class Target_sparc : public Sized_target<size, big_endian>
55 {
56 public:
57 typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
58
59 Target_sparc()
60 : Sized_target<size, big_endian>(&sparc_info),
61 got_(NULL), plt_(NULL), rela_dyn_(NULL),
62 copy_relocs_(elfcpp::R_SPARC_COPY), dynbss_(NULL),
63 got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL)
64 {
65 }
66
67 // Process the relocations to determine unreferenced sections for
68 // garbage collection.
69 void
70 gc_process_relocs(Symbol_table* symtab,
71 Layout* layout,
72 Sized_relobj_file<size, big_endian>* object,
73 unsigned int data_shndx,
74 unsigned int sh_type,
75 const unsigned char* prelocs,
76 size_t reloc_count,
77 Output_section* output_section,
78 bool needs_special_offset_handling,
79 size_t local_symbol_count,
80 const unsigned char* plocal_symbols);
81
82 // Scan the relocations to look for symbol adjustments.
83 void
84 scan_relocs(Symbol_table* symtab,
85 Layout* layout,
86 Sized_relobj_file<size, big_endian>* object,
87 unsigned int data_shndx,
88 unsigned int sh_type,
89 const unsigned char* prelocs,
90 size_t reloc_count,
91 Output_section* output_section,
92 bool needs_special_offset_handling,
93 size_t local_symbol_count,
94 const unsigned char* plocal_symbols);
95 // Finalize the sections.
96 void
97 do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
98
99 // Return the value to use for a dynamic which requires special
100 // treatment.
101 uint64_t
102 do_dynsym_value(const Symbol*) const;
103
104 // Relocate a section.
105 void
106 relocate_section(const Relocate_info<size, big_endian>*,
107 unsigned int sh_type,
108 const unsigned char* prelocs,
109 size_t reloc_count,
110 Output_section* output_section,
111 bool needs_special_offset_handling,
112 unsigned char* view,
113 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
114 section_size_type view_size,
115 const Reloc_symbol_changes*);
116
117 // Scan the relocs during a relocatable link.
118 void
119 scan_relocatable_relocs(Symbol_table* symtab,
120 Layout* layout,
121 Sized_relobj_file<size, big_endian>* object,
122 unsigned int data_shndx,
123 unsigned int sh_type,
124 const unsigned char* prelocs,
125 size_t reloc_count,
126 Output_section* output_section,
127 bool needs_special_offset_handling,
128 size_t local_symbol_count,
129 const unsigned char* plocal_symbols,
130 Relocatable_relocs*);
131
132 // Relocate a section during a relocatable link.
133 void
134 relocate_for_relocatable(const Relocate_info<size, big_endian>*,
135 unsigned int sh_type,
136 const unsigned char* prelocs,
137 size_t reloc_count,
138 Output_section* output_section,
139 off_t offset_in_output_section,
140 const Relocatable_relocs*,
141 unsigned char* view,
142 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
143 section_size_type view_size,
144 unsigned char* reloc_view,
145 section_size_type reloc_view_size);
146 // Return whether SYM is defined by the ABI.
147 bool
148 do_is_defined_by_abi(const Symbol* sym) const
149 {
150 // XXX Really need to support this better...
151 if (sym->type() == elfcpp::STT_SPARC_REGISTER)
152 return 1;
153
154 return strcmp(sym->name(), "___tls_get_addr") == 0;
155 }
156
157 // Return whether there is a GOT section.
158 bool
159 has_got_section() const
160 { return this->got_ != NULL; }
161
162 // Return the size of the GOT section.
163 section_size_type
164 got_size() const
165 {
166 gold_assert(this->got_ != NULL);
167 return this->got_->data_size();
168 }
169
170 // Return the number of entries in the GOT.
171 unsigned int
172 got_entry_count() const
173 {
174 if (this->got_ == NULL)
175 return 0;
176 return this->got_size() / (size / 8);
177 }
178
179 // Return the number of entries in the PLT.
180 unsigned int
181 plt_entry_count() const;
182
183 // Return the offset of the first non-reserved PLT entry.
184 unsigned int
185 first_plt_entry_offset() const;
186
187 // Return the size of each PLT entry.
188 unsigned int
189 plt_entry_size() const;
190
191 private:
192
193 // The class which scans relocations.
194 class Scan
195 {
196 public:
197 Scan()
198 : issued_non_pic_error_(false)
199 { }
200
201 static inline int
202 get_reference_flags(unsigned int r_type);
203
204 inline void
205 local(Symbol_table* symtab, Layout* layout, Target_sparc* target,
206 Sized_relobj_file<size, big_endian>* object,
207 unsigned int data_shndx,
208 Output_section* output_section,
209 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
210 const elfcpp::Sym<size, big_endian>& lsym);
211
212 inline void
213 global(Symbol_table* symtab, Layout* layout, Target_sparc* target,
214 Sized_relobj_file<size, big_endian>* object,
215 unsigned int data_shndx,
216 Output_section* output_section,
217 const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
218 Symbol* gsym);
219
220 inline bool
221 local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
222 Target_sparc* ,
223 Sized_relobj_file<size, big_endian>* ,
224 unsigned int ,
225 Output_section* ,
226 const elfcpp::Rela<size, big_endian>& ,
227 unsigned int ,
228 const elfcpp::Sym<size, big_endian>&)
229 { return false; }
230
231 inline bool
232 global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
233 Target_sparc* ,
234 Sized_relobj_file<size, big_endian>* ,
235 unsigned int ,
236 Output_section* ,
237 const elfcpp::Rela<size,
238 big_endian>& ,
239 unsigned int , Symbol*)
240 { return false; }
241
242
243 private:
244 static void
245 unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
246 unsigned int r_type);
247
248 static void
249 unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
250 unsigned int r_type, Symbol*);
251
252 static void
253 generate_tls_call(Symbol_table* symtab, Layout* layout,
254 Target_sparc* target);
255
256 void
257 check_non_pic(Relobj*, unsigned int r_type);
258
259 // Whether we have issued an error about a non-PIC compilation.
260 bool issued_non_pic_error_;
261 };
262
263 // The class which implements relocation.
264 class Relocate
265 {
266 public:
267 Relocate()
268 : ignore_gd_add_(false), reloc_adjust_addr_(NULL)
269 { }
270
271 ~Relocate()
272 {
273 if (this->ignore_gd_add_)
274 {
275 // FIXME: This needs to specify the location somehow.
276 gold_error(_("missing expected TLS relocation"));
277 }
278 }
279
280 // Do a relocation. Return false if the caller should not issue
281 // any warnings about this relocation.
282 inline bool
283 relocate(const Relocate_info<size, big_endian>*, Target_sparc*,
284 Output_section*, size_t relnum,
285 const elfcpp::Rela<size, big_endian>&,
286 unsigned int r_type, const Sized_symbol<size>*,
287 const Symbol_value<size>*,
288 unsigned char*,
289 typename elfcpp::Elf_types<size>::Elf_Addr,
290 section_size_type);
291
292 private:
293 // Do a TLS relocation.
294 inline void
295 relocate_tls(const Relocate_info<size, big_endian>*, Target_sparc* target,
296 size_t relnum, const elfcpp::Rela<size, big_endian>&,
297 unsigned int r_type, const Sized_symbol<size>*,
298 const Symbol_value<size>*,
299 unsigned char*,
300 typename elfcpp::Elf_types<size>::Elf_Addr,
301 section_size_type);
302
303 // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD
304 bool ignore_gd_add_;
305
306 // If we hit a reloc at this view address, adjust it back by 4 bytes.
307 unsigned char *reloc_adjust_addr_;
308 };
309
310 // A class which returns the size required for a relocation type,
311 // used while scanning relocs during a relocatable link.
312 class Relocatable_size_for_reloc
313 {
314 public:
315 unsigned int
316 get_size_for_reloc(unsigned int, Relobj*);
317 };
318
319 // Get the GOT section, creating it if necessary.
320 Output_data_got<size, big_endian>*
321 got_section(Symbol_table*, Layout*);
322
323 // Create a PLT entry for a global symbol.
324 void
325 make_plt_entry(Symbol_table*, Layout*, Symbol*);
326
327 // Create a GOT entry for the TLS module index.
328 unsigned int
329 got_mod_index_entry(Symbol_table* symtab, Layout* layout,
330 Sized_relobj_file<size, big_endian>* object);
331
332 // Return the gsym for "__tls_get_addr". Cache if not already
333 // cached.
334 Symbol*
335 tls_get_addr_sym(Symbol_table* symtab)
336 {
337 if (!this->tls_get_addr_sym_)
338 this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL);
339 gold_assert(this->tls_get_addr_sym_);
340 return this->tls_get_addr_sym_;
341 }
342
343 // Get the PLT section.
344 const Output_data_plt_sparc<size, big_endian>*
345 plt_section() const
346 {
347 gold_assert(this->plt_ != NULL);
348 return this->plt_;
349 }
350
351 // Get the dynamic reloc section, creating it if necessary.
352 Reloc_section*
353 rela_dyn_section(Layout*);
354
355 // Copy a relocation against a global symbol.
356 void
357 copy_reloc(Symbol_table* symtab, Layout* layout,
358 Sized_relobj_file<size, big_endian>* object,
359 unsigned int shndx, Output_section* output_section,
360 Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
361 {
362 this->copy_relocs_.copy_reloc(symtab, layout,
363 symtab->get_sized_symbol<size>(sym),
364 object, shndx, output_section,
365 reloc, this->rela_dyn_section(layout));
366 }
367
368 // Information about this specific target which we pass to the
369 // general Target structure.
370 static Target::Target_info sparc_info;
371
372 // The types of GOT entries needed for this platform.
373 // These values are exposed to the ABI in an incremental link.
374 // Do not renumber existing values without changing the version
375 // number of the .gnu_incremental_inputs section.
376 enum Got_type
377 {
378 GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
379 GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
380 GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
381 };
382
383 // The GOT section.
384 Output_data_got<size, big_endian>* got_;
385 // The PLT section.
386 Output_data_plt_sparc<size, big_endian>* plt_;
387 // The dynamic reloc section.
388 Reloc_section* rela_dyn_;
389 // Relocs saved to avoid a COPY reloc.
390 Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
391 // Space for variables copied with a COPY reloc.
392 Output_data_space* dynbss_;
393 // Offset of the GOT entry for the TLS module index;
394 unsigned int got_mod_index_offset_;
395 // Cached pointer to __tls_get_addr symbol
396 Symbol* tls_get_addr_sym_;
397 };
398
399 template<>
400 Target::Target_info Target_sparc<32, true>::sparc_info =
401 {
402 32, // size
403 true, // is_big_endian
404 elfcpp::EM_SPARC, // machine_code
405 false, // has_make_symbol
406 false, // has_resolve
407 false, // has_code_fill
408 true, // is_default_stack_executable
409 false, // can_icf_inline_merge_sections
410 '\0', // wrap_char
411 "/usr/lib/ld.so.1", // dynamic_linker
412 0x00010000, // default_text_segment_address
413 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
414 8 * 1024, // common_pagesize (overridable by -z common-page-size)
415 elfcpp::SHN_UNDEF, // small_common_shndx
416 elfcpp::SHN_UNDEF, // large_common_shndx
417 0, // small_common_section_flags
418 0, // large_common_section_flags
419 NULL, // attributes_section
420 NULL // attributes_vendor
421 };
422
423 template<>
424 Target::Target_info Target_sparc<64, true>::sparc_info =
425 {
426 64, // size
427 true, // is_big_endian
428 elfcpp::EM_SPARCV9, // machine_code
429 false, // has_make_symbol
430 false, // has_resolve
431 false, // has_code_fill
432 true, // is_default_stack_executable
433 false, // can_icf_inline_merge_sections
434 '\0', // wrap_char
435 "/usr/lib/sparcv9/ld.so.1", // dynamic_linker
436 0x100000, // default_text_segment_address
437 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
438 8 * 1024, // common_pagesize (overridable by -z common-page-size)
439 elfcpp::SHN_UNDEF, // small_common_shndx
440 elfcpp::SHN_UNDEF, // large_common_shndx
441 0, // small_common_section_flags
442 0, // large_common_section_flags
443 NULL, // attributes_section
444 NULL // attributes_vendor
445 };
446
447 // We have to take care here, even when operating in little-endian
448 // mode, sparc instructions are still big endian.
449 template<int size, bool big_endian>
450 class Sparc_relocate_functions
451 {
452 private:
453 // Do a simple relocation with the addend in the relocation.
454 template<int valsize>
455 static inline void
456 rela(unsigned char* view,
457 unsigned int right_shift,
458 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
459 typename elfcpp::Swap<size, big_endian>::Valtype value,
460 typename elfcpp::Swap<size, big_endian>::Valtype addend)
461 {
462 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
463 Valtype* wv = reinterpret_cast<Valtype*>(view);
464 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
465 Valtype reloc = ((value + addend) >> right_shift);
466
467 val &= ~dst_mask;
468 reloc &= dst_mask;
469
470 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
471 }
472
473 // Do a simple relocation using a symbol value with the addend in
474 // the relocation.
475 template<int valsize>
476 static inline void
477 rela(unsigned char* view,
478 unsigned int right_shift,
479 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
480 const Sized_relobj_file<size, big_endian>* object,
481 const Symbol_value<size>* psymval,
482 typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
483 {
484 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
485 Valtype* wv = reinterpret_cast<Valtype*>(view);
486 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
487 Valtype reloc = (psymval->value(object, addend) >> right_shift);
488
489 val &= ~dst_mask;
490 reloc &= dst_mask;
491
492 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
493 }
494
495 // Do a simple relocation using a symbol value with the addend in
496 // the relocation, unaligned.
497 template<int valsize>
498 static inline void
499 rela_ua(unsigned char* view,
500 unsigned int right_shift, elfcpp::Elf_Xword dst_mask,
501 const Sized_relobj_file<size, big_endian>* object,
502 const Symbol_value<size>* psymval,
503 typename elfcpp::Swap<size, big_endian>::Valtype addend)
504 {
505 typedef typename elfcpp::Swap_unaligned<valsize,
506 big_endian>::Valtype Valtype;
507 unsigned char* wv = view;
508 Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv);
509 Valtype reloc = (psymval->value(object, addend) >> right_shift);
510
511 val &= ~dst_mask;
512 reloc &= dst_mask;
513
514 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc);
515 }
516
517 // Do a simple PC relative relocation with a Symbol_value with the
518 // addend in the relocation.
519 template<int valsize>
520 static inline void
521 pcrela(unsigned char* view,
522 unsigned int right_shift,
523 typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
524 const Sized_relobj_file<size, big_endian>* object,
525 const Symbol_value<size>* psymval,
526 typename elfcpp::Swap<size, big_endian>::Valtype addend,
527 typename elfcpp::Elf_types<size>::Elf_Addr address)
528 {
529 typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
530 Valtype* wv = reinterpret_cast<Valtype*>(view);
531 Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
532 Valtype reloc = ((psymval->value(object, addend) - address)
533 >> right_shift);
534
535 val &= ~dst_mask;
536 reloc &= dst_mask;
537
538 elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
539 }
540
541 template<int valsize>
542 static inline void
543 pcrela_unaligned(unsigned char* view,
544 const Sized_relobj_file<size, big_endian>* object,
545 const Symbol_value<size>* psymval,
546 typename elfcpp::Swap<size, big_endian>::Valtype addend,
547 typename elfcpp::Elf_types<size>::Elf_Addr address)
548 {
549 typedef typename elfcpp::Swap_unaligned<valsize,
550 big_endian>::Valtype Valtype;
551 unsigned char* wv = view;
552 Valtype reloc = (psymval->value(object, addend) - address);
553
554 elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc);
555 }
556
557 typedef Sparc_relocate_functions<size, big_endian> This;
558 typedef Sparc_relocate_functions<size, true> This_insn;
559
560 public:
561 // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2
562 static inline void
563 wdisp30(unsigned char* view,
564 const Sized_relobj_file<size, big_endian>* object,
565 const Symbol_value<size>* psymval,
566 typename elfcpp::Elf_types<size>::Elf_Addr addend,
567 typename elfcpp::Elf_types<size>::Elf_Addr address)
568 {
569 This_insn::template pcrela<32>(view, 2, 0x3fffffff, object,
570 psymval, addend, address);
571 }
572
573 // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2
574 static inline void
575 wdisp22(unsigned char* view,
576 const Sized_relobj_file<size, big_endian>* object,
577 const Symbol_value<size>* psymval,
578 typename elfcpp::Elf_types<size>::Elf_Addr addend,
579 typename elfcpp::Elf_types<size>::Elf_Addr address)
580 {
581 This_insn::template pcrela<32>(view, 2, 0x003fffff, object,
582 psymval, addend, address);
583 }
584
585 // R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2
586 static inline void
587 wdisp19(unsigned char* view,
588 const Sized_relobj_file<size, big_endian>* object,
589 const Symbol_value<size>* psymval,
590 typename elfcpp::Elf_types<size>::Elf_Addr addend,
591 typename elfcpp::Elf_types<size>::Elf_Addr address)
592 {
593 This_insn::template pcrela<32>(view, 2, 0x0007ffff, object,
594 psymval, addend, address);
595 }
596
597 // R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2
598 static inline void
599 wdisp16(unsigned char* view,
600 const Sized_relobj_file<size, big_endian>* object,
601 const Symbol_value<size>* psymval,
602 typename elfcpp::Elf_types<size>::Elf_Addr addend,
603 typename elfcpp::Elf_types<size>::Elf_Addr address)
604 {
605 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
606 Valtype* wv = reinterpret_cast<Valtype*>(view);
607 Valtype val = elfcpp::Swap<32, true>::readval(wv);
608 Valtype reloc = ((psymval->value(object, addend) - address)
609 >> 2);
610
611 // The relocation value is split between the low 14 bits,
612 // and bits 20-21.
613 val &= ~((0x3 << 20) | 0x3fff);
614 reloc = (((reloc & 0xc000) << (20 - 14))
615 | (reloc & 0x3ffff));
616
617 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
618 }
619
620 // R_SPARC_PC22: (Symbol + Addend - Address) >> 10
621 static inline void
622 pc22(unsigned char* view,
623 const Sized_relobj_file<size, big_endian>* object,
624 const Symbol_value<size>* psymval,
625 typename elfcpp::Elf_types<size>::Elf_Addr addend,
626 typename elfcpp::Elf_types<size>::Elf_Addr address)
627 {
628 This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
629 psymval, addend, address);
630 }
631
632 // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff
633 static inline void
634 pc10(unsigned char* view,
635 const Sized_relobj_file<size, big_endian>* object,
636 const Symbol_value<size>* psymval,
637 typename elfcpp::Elf_types<size>::Elf_Addr addend,
638 typename elfcpp::Elf_types<size>::Elf_Addr address)
639 {
640 This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
641 psymval, addend, address);
642 }
643
644 // R_SPARC_HI22: (Symbol + Addend) >> 10
645 static inline void
646 hi22(unsigned char* view,
647 typename elfcpp::Elf_types<size>::Elf_Addr value,
648 typename elfcpp::Elf_types<size>::Elf_Addr addend)
649 {
650 This_insn::template rela<32>(view, 10, 0x003fffff, value, addend);
651 }
652
653 // R_SPARC_HI22: (Symbol + Addend) >> 10
654 static inline void
655 hi22(unsigned char* view,
656 const Sized_relobj_file<size, big_endian>* object,
657 const Symbol_value<size>* psymval,
658 typename elfcpp::Elf_types<size>::Elf_Addr addend)
659 {
660 This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend);
661 }
662
663 // R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10
664 static inline void
665 pcplt22(unsigned char* view,
666 const Sized_relobj_file<size, big_endian>* object,
667 const Symbol_value<size>* psymval,
668 typename elfcpp::Elf_types<size>::Elf_Addr addend,
669 typename elfcpp::Elf_types<size>::Elf_Addr address)
670 {
671 This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
672 psymval, addend, address);
673 }
674
675 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
676 static inline void
677 lo10(unsigned char* view,
678 typename elfcpp::Elf_types<size>::Elf_Addr value,
679 typename elfcpp::Elf_types<size>::Elf_Addr addend)
680 {
681 This_insn::template rela<32>(view, 0, 0x000003ff, value, addend);
682 }
683
684 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
685 static inline void
686 lo10(unsigned char* view,
687 const Sized_relobj_file<size, big_endian>* object,
688 const Symbol_value<size>* psymval,
689 typename elfcpp::Elf_types<size>::Elf_Addr addend)
690 {
691 This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
692 }
693
694 // R_SPARC_LO10: (Symbol + Addend) & 0x3ff
695 static inline void
696 lo10(unsigned char* view,
697 const Sized_relobj_file<size, big_endian>* object,
698 const Symbol_value<size>* psymval,
699 typename elfcpp::Elf_types<size>::Elf_Addr addend,
700 typename elfcpp::Elf_types<size>::Elf_Addr address)
701 {
702 This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
703 psymval, addend, address);
704 }
705
706 // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2
707 static inline void
708 olo10(unsigned char* view,
709 const Sized_relobj_file<size, big_endian>* object,
710 const Symbol_value<size>* psymval,
711 typename elfcpp::Elf_types<size>::Elf_Addr addend,
712 typename elfcpp::Elf_types<size>::Elf_Addr addend2)
713 {
714 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
715 Valtype* wv = reinterpret_cast<Valtype*>(view);
716 Valtype val = elfcpp::Swap<32, true>::readval(wv);
717 Valtype reloc = psymval->value(object, addend);
718
719 val &= ~0x1fff;
720 reloc &= 0x3ff;
721 reloc += addend2;
722 reloc &= 0x1fff;
723
724 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
725 }
726
727 // R_SPARC_22: (Symbol + Addend)
728 static inline void
729 rela32_22(unsigned char* view,
730 const Sized_relobj_file<size, big_endian>* object,
731 const Symbol_value<size>* psymval,
732 typename elfcpp::Elf_types<size>::Elf_Addr addend)
733 {
734 This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend);
735 }
736
737 // R_SPARC_13: (Symbol + Addend)
738 static inline void
739 rela32_13(unsigned char* view,
740 typename elfcpp::Elf_types<size>::Elf_Addr value,
741 typename elfcpp::Elf_types<size>::Elf_Addr addend)
742 {
743 This_insn::template rela<32>(view, 0, 0x00001fff, value, addend);
744 }
745
746 // R_SPARC_13: (Symbol + Addend)
747 static inline void
748 rela32_13(unsigned char* view,
749 const Sized_relobj_file<size, big_endian>* object,
750 const Symbol_value<size>* psymval,
751 typename elfcpp::Elf_types<size>::Elf_Addr addend)
752 {
753 This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend);
754 }
755
756 // R_SPARC_UA16: (Symbol + Addend)
757 static inline void
758 ua16(unsigned char* view,
759 const Sized_relobj_file<size, big_endian>* object,
760 const Symbol_value<size>* psymval,
761 typename elfcpp::Elf_types<size>::Elf_Addr addend)
762 {
763 This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend);
764 }
765
766 // R_SPARC_UA32: (Symbol + Addend)
767 static inline void
768 ua32(unsigned char* view,
769 const Sized_relobj_file<size, big_endian>* object,
770 const Symbol_value<size>* psymval,
771 typename elfcpp::Elf_types<size>::Elf_Addr addend)
772 {
773 This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend);
774 }
775
776 // R_SPARC_UA64: (Symbol + Addend)
777 static inline void
778 ua64(unsigned char* view,
779 const Sized_relobj_file<size, big_endian>* object,
780 const Symbol_value<size>* psymval,
781 typename elfcpp::Elf_types<size>::Elf_Addr addend)
782 {
783 This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0,
784 object, psymval, addend);
785 }
786
787 // R_SPARC_DISP8: (Symbol + Addend - Address)
788 static inline void
789 disp8(unsigned char* view,
790 const Sized_relobj_file<size, big_endian>* object,
791 const Symbol_value<size>* psymval,
792 typename elfcpp::Elf_types<size>::Elf_Addr addend,
793 typename elfcpp::Elf_types<size>::Elf_Addr address)
794 {
795 This::template pcrela_unaligned<8>(view, object, psymval,
796 addend, address);
797 }
798
799 // R_SPARC_DISP16: (Symbol + Addend - Address)
800 static inline void
801 disp16(unsigned char* view,
802 const Sized_relobj_file<size, big_endian>* object,
803 const Symbol_value<size>* psymval,
804 typename elfcpp::Elf_types<size>::Elf_Addr addend,
805 typename elfcpp::Elf_types<size>::Elf_Addr address)
806 {
807 This::template pcrela_unaligned<16>(view, object, psymval,
808 addend, address);
809 }
810
811 // R_SPARC_DISP32: (Symbol + Addend - Address)
812 static inline void
813 disp32(unsigned char* view,
814 const Sized_relobj_file<size, big_endian>* object,
815 const Symbol_value<size>* psymval,
816 typename elfcpp::Elf_types<size>::Elf_Addr addend,
817 typename elfcpp::Elf_types<size>::Elf_Addr address)
818 {
819 This::template pcrela_unaligned<32>(view, object, psymval,
820 addend, address);
821 }
822
823 // R_SPARC_DISP64: (Symbol + Addend - Address)
824 static inline void
825 disp64(unsigned char* view,
826 const Sized_relobj_file<size, big_endian>* object,
827 const Symbol_value<size>* psymval,
828 elfcpp::Elf_Xword addend,
829 typename elfcpp::Elf_types<size>::Elf_Addr address)
830 {
831 This::template pcrela_unaligned<64>(view, object, psymval,
832 addend, address);
833 }
834
835 // R_SPARC_H44: (Symbol + Addend) >> 22
836 static inline void
837 h44(unsigned char* view,
838 const Sized_relobj_file<size, big_endian>* object,
839 const Symbol_value<size>* psymval,
840 typename elfcpp::Elf_types<size>::Elf_Addr addend)
841 {
842 This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend);
843 }
844
845 // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff
846 static inline void
847 m44(unsigned char* view,
848 const Sized_relobj_file<size, big_endian>* object,
849 const Symbol_value<size>* psymval,
850 typename elfcpp::Elf_types<size>::Elf_Addr addend)
851 {
852 This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend);
853 }
854
855 // R_SPARC_L44: (Symbol + Addend) & 0xfff
856 static inline void
857 l44(unsigned char* view,
858 const Sized_relobj_file<size, big_endian>* object,
859 const Symbol_value<size>* psymval,
860 typename elfcpp::Elf_types<size>::Elf_Addr addend)
861 {
862 This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend);
863 }
864
865 // R_SPARC_HH22: (Symbol + Addend) >> 42
866 static inline void
867 hh22(unsigned char* view,
868 const Sized_relobj_file<size, big_endian>* object,
869 const Symbol_value<size>* psymval,
870 typename elfcpp::Elf_types<size>::Elf_Addr addend)
871 {
872 This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend);
873 }
874
875 // R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42
876 static inline void
877 pc_hh22(unsigned char* view,
878 const Sized_relobj_file<size, big_endian>* object,
879 const Symbol_value<size>* psymval,
880 typename elfcpp::Elf_types<size>::Elf_Addr addend,
881 typename elfcpp::Elf_types<size>::Elf_Addr address)
882 {
883 This_insn::template pcrela<32>(view, 42, 0x003fffff, object,
884 psymval, addend, address);
885 }
886
887 // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff
888 static inline void
889 hm10(unsigned char* view,
890 const Sized_relobj_file<size, big_endian>* object,
891 const Symbol_value<size>* psymval,
892 typename elfcpp::Elf_types<size>::Elf_Addr addend)
893 {
894 This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend);
895 }
896
897 // R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff
898 static inline void
899 pc_hm10(unsigned char* view,
900 const Sized_relobj_file<size, big_endian>* object,
901 const Symbol_value<size>* psymval,
902 typename elfcpp::Elf_types<size>::Elf_Addr addend,
903 typename elfcpp::Elf_types<size>::Elf_Addr address)
904 {
905 This_insn::template pcrela<32>(view, 32, 0x000003ff, object,
906 psymval, addend, address);
907 }
908
909 // R_SPARC_11: (Symbol + Addend)
910 static inline void
911 rela32_11(unsigned char* view,
912 const Sized_relobj_file<size, big_endian>* object,
913 const Symbol_value<size>* psymval,
914 typename elfcpp::Elf_types<size>::Elf_Addr addend)
915 {
916 This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend);
917 }
918
919 // R_SPARC_10: (Symbol + Addend)
920 static inline void
921 rela32_10(unsigned char* view,
922 const Sized_relobj_file<size, big_endian>* object,
923 const Symbol_value<size>* psymval,
924 typename elfcpp::Elf_types<size>::Elf_Addr addend)
925 {
926 This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
927 }
928
929 // R_SPARC_7: (Symbol + Addend)
930 static inline void
931 rela32_7(unsigned char* view,
932 const Sized_relobj_file<size, big_endian>* object,
933 const Symbol_value<size>* psymval,
934 typename elfcpp::Elf_types<size>::Elf_Addr addend)
935 {
936 This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend);
937 }
938
939 // R_SPARC_6: (Symbol + Addend)
940 static inline void
941 rela32_6(unsigned char* view,
942 const Sized_relobj_file<size, big_endian>* object,
943 const Symbol_value<size>* psymval,
944 typename elfcpp::Elf_types<size>::Elf_Addr addend)
945 {
946 This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend);
947 }
948
949 // R_SPARC_5: (Symbol + Addend)
950 static inline void
951 rela32_5(unsigned char* view,
952 const Sized_relobj_file<size, big_endian>* object,
953 const Symbol_value<size>* psymval,
954 typename elfcpp::Elf_types<size>::Elf_Addr addend)
955 {
956 This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend);
957 }
958
959 // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10
960 static inline void
961 ldo_hix22(unsigned char* view,
962 typename elfcpp::Elf_types<size>::Elf_Addr value,
963 typename elfcpp::Elf_types<size>::Elf_Addr addend)
964 {
965 This_insn::hi22(view, value, addend);
966 }
967
968 // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff
969 static inline void
970 ldo_lox10(unsigned char* view,
971 typename elfcpp::Elf_types<size>::Elf_Addr value,
972 typename elfcpp::Elf_types<size>::Elf_Addr addend)
973 {
974 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
975 Valtype* wv = reinterpret_cast<Valtype*>(view);
976 Valtype val = elfcpp::Swap<32, true>::readval(wv);
977 Valtype reloc = (value + addend);
978
979 val &= ~0x1fff;
980 reloc &= 0x3ff;
981
982 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
983 }
984
985 // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10
986 static inline void
987 hix22(unsigned char* view,
988 typename elfcpp::Elf_types<size>::Elf_Addr value,
989 typename elfcpp::Elf_types<size>::Elf_Addr addend)
990 {
991 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
992 Valtype* wv = reinterpret_cast<Valtype*>(view);
993 Valtype val = elfcpp::Swap<32, true>::readval(wv);
994 Valtype reloc = (value + addend);
995
996 val &= ~0x3fffff;
997
998 reloc ^= ~(Valtype)0;
999 reloc >>= 10;
1000
1001 reloc &= 0x3fffff;
1002
1003 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1004 }
1005
1006 // R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10
1007 static inline void
1008 hix22(unsigned char* view,
1009 const Sized_relobj_file<size, big_endian>* object,
1010 const Symbol_value<size>* psymval,
1011 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1012 {
1013 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1014 Valtype* wv = reinterpret_cast<Valtype*>(view);
1015 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1016 Valtype reloc = psymval->value(object, addend);
1017
1018 val &= ~0x3fffff;
1019
1020 reloc ^= ~(Valtype)0;
1021 reloc >>= 10;
1022
1023 reloc &= 0x3fffff;
1024
1025 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1026 }
1027
1028
1029 // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00
1030 static inline void
1031 lox10(unsigned char* view,
1032 typename elfcpp::Elf_types<size>::Elf_Addr value,
1033 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1034 {
1035 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1036 Valtype* wv = reinterpret_cast<Valtype*>(view);
1037 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1038 Valtype reloc = (value + addend);
1039
1040 val &= ~0x1fff;
1041 reloc &= 0x3ff;
1042 reloc |= 0x1c00;
1043
1044 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1045 }
1046
1047 // R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00
1048 static inline void
1049 lox10(unsigned char* view,
1050 const Sized_relobj_file<size, big_endian>* object,
1051 const Symbol_value<size>* psymval,
1052 typename elfcpp::Elf_types<size>::Elf_Addr addend)
1053 {
1054 typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
1055 Valtype* wv = reinterpret_cast<Valtype*>(view);
1056 Valtype val = elfcpp::Swap<32, true>::readval(wv);
1057 Valtype reloc = psymval->value(object, addend);
1058
1059 val &= ~0x1fff;
1060 reloc &= 0x3ff;
1061 reloc |= 0x1c00;
1062
1063 elfcpp::Swap<32, true>::writeval(wv, val | reloc);
1064 }
1065 };
1066
1067 // Get the GOT section, creating it if necessary.
1068
1069 template<int size, bool big_endian>
1070 Output_data_got<size, big_endian>*
1071 Target_sparc<size, big_endian>::got_section(Symbol_table* symtab,
1072 Layout* layout)
1073 {
1074 if (this->got_ == NULL)
1075 {
1076 gold_assert(symtab != NULL && layout != NULL);
1077
1078 this->got_ = new Output_data_got<size, big_endian>();
1079
1080 layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
1081 (elfcpp::SHF_ALLOC
1082 | elfcpp::SHF_WRITE),
1083 this->got_, ORDER_RELRO, true);
1084
1085 // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
1086 symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
1087 Symbol_table::PREDEFINED,
1088 this->got_,
1089 0, 0, elfcpp::STT_OBJECT,
1090 elfcpp::STB_LOCAL,
1091 elfcpp::STV_HIDDEN, 0,
1092 false, false);
1093 }
1094
1095 return this->got_;
1096 }
1097
1098 // Get the dynamic reloc section, creating it if necessary.
1099
1100 template<int size, bool big_endian>
1101 typename Target_sparc<size, big_endian>::Reloc_section*
1102 Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout)
1103 {
1104 if (this->rela_dyn_ == NULL)
1105 {
1106 gold_assert(layout != NULL);
1107 this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
1108 layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
1109 elfcpp::SHF_ALLOC, this->rela_dyn_,
1110 ORDER_DYNAMIC_RELOCS, false);
1111 }
1112 return this->rela_dyn_;
1113 }
1114
1115 // A class to handle the PLT data.
1116
1117 template<int size, bool big_endian>
1118 class Output_data_plt_sparc : public Output_section_data
1119 {
1120 public:
1121 typedef Output_data_reloc<elfcpp::SHT_RELA, true,
1122 size, big_endian> Reloc_section;
1123
1124 Output_data_plt_sparc(Layout*);
1125
1126 // Add an entry to the PLT.
1127 void add_entry(Symbol* gsym);
1128
1129 // Return the .rela.plt section data.
1130 const Reloc_section* rel_plt() const
1131 {
1132 return this->rel_;
1133 }
1134
1135 // Return the number of PLT entries.
1136 unsigned int
1137 entry_count() const
1138 { return this->count_; }
1139
1140 // Return the offset of the first non-reserved PLT entry.
1141 static unsigned int
1142 first_plt_entry_offset()
1143 { return 4 * base_plt_entry_size; }
1144
1145 // Return the size of a PLT entry.
1146 static unsigned int
1147 get_plt_entry_size()
1148 { return base_plt_entry_size; }
1149
1150 protected:
1151 void do_adjust_output_section(Output_section* os);
1152
1153 // Write to a map file.
1154 void
1155 do_print_to_mapfile(Mapfile* mapfile) const
1156 { mapfile->print_output_data(this, _("** PLT")); }
1157
1158 private:
1159 // The size of an entry in the PLT.
1160 static const int base_plt_entry_size = (size == 32 ? 12 : 32);
1161
1162 static const unsigned int plt_entries_per_block = 160;
1163 static const unsigned int plt_insn_chunk_size = 24;
1164 static const unsigned int plt_pointer_chunk_size = 8;
1165 static const unsigned int plt_block_size =
1166 (plt_entries_per_block
1167 * (plt_insn_chunk_size + plt_pointer_chunk_size));
1168
1169 // Set the final size.
1170 void
1171 set_final_data_size()
1172 {
1173 unsigned int full_count = this->count_ + 4;
1174 unsigned int extra = (size == 32 ? 4 : 0);
1175
1176 if (size == 32 || full_count < 32768)
1177 this->set_data_size((full_count * base_plt_entry_size) + extra);
1178 else
1179 {
1180 unsigned int ext_cnt = full_count - 32768;
1181
1182 this->set_data_size((32768 * base_plt_entry_size)
1183 + (ext_cnt
1184 * (plt_insn_chunk_size
1185 + plt_pointer_chunk_size)));
1186 }
1187 }
1188
1189 // Write out the PLT data.
1190 void
1191 do_write(Output_file*);
1192
1193 // The reloc section.
1194 Reloc_section* rel_;
1195 // The number of PLT entries.
1196 unsigned int count_;
1197 };
1198
1199 // Define the constants as required by C++ standard.
1200
1201 template<int size, bool big_endian>
1202 const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size;
1203
1204 template<int size, bool big_endian>
1205 const unsigned int
1206 Output_data_plt_sparc<size, big_endian>::plt_entries_per_block;
1207
1208 template<int size, bool big_endian>
1209 const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size;
1210
1211 template<int size, bool big_endian>
1212 const unsigned int
1213 Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size;
1214
1215 template<int size, bool big_endian>
1216 const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size;
1217
1218 // Create the PLT section. The ordinary .got section is an argument,
1219 // since we need to refer to the start.
1220
1221 template<int size, bool big_endian>
1222 Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout)
1223 : Output_section_data(size == 32 ? 4 : 8), count_(0)
1224 {
1225 this->rel_ = new Reloc_section(false);
1226 layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
1227 elfcpp::SHF_ALLOC, this->rel_,
1228 ORDER_DYNAMIC_PLT_RELOCS, false);
1229 }
1230
1231 template<int size, bool big_endian>
1232 void
1233 Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os)
1234 {
1235 os->set_entsize(0);
1236 }
1237
1238 // Add an entry to the PLT.
1239
1240 template<int size, bool big_endian>
1241 void
1242 Output_data_plt_sparc<size, big_endian>::add_entry(Symbol* gsym)
1243 {
1244 gold_assert(!gsym->has_plt_offset());
1245
1246 unsigned int index = this->count_ + 4;
1247 section_offset_type plt_offset;
1248
1249 if (size == 32 || index < 32768)
1250 plt_offset = index * base_plt_entry_size;
1251 else
1252 {
1253 unsigned int ext_index = index - 32768;
1254
1255 plt_offset = (32768 * base_plt_entry_size)
1256 + ((ext_index / plt_entries_per_block)
1257 * plt_block_size)
1258 + ((ext_index % plt_entries_per_block)
1259 * plt_insn_chunk_size);
1260 }
1261
1262 gsym->set_plt_offset(plt_offset);
1263
1264 ++this->count_;
1265
1266 // Every PLT entry needs a reloc.
1267 gsym->set_needs_dynsym_entry();
1268 this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this,
1269 plt_offset, 0);
1270
1271 // Note that we don't need to save the symbol. The contents of the
1272 // PLT are independent of which symbols are used. The symbols only
1273 // appear in the relocations.
1274 }
1275
1276 static const unsigned int sparc_nop = 0x01000000;
1277 static const unsigned int sparc_sethi_g1 = 0x03000000;
1278 static const unsigned int sparc_branch_always = 0x30800000;
1279 static const unsigned int sparc_branch_always_pt = 0x30680000;
1280 static const unsigned int sparc_mov = 0x80100000;
1281 static const unsigned int sparc_mov_g0_o0 = 0x90100000;
1282 static const unsigned int sparc_mov_o7_g5 = 0x8a10000f;
1283 static const unsigned int sparc_call_plus_8 = 0x40000002;
1284 static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000;
1285 static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001;
1286 static const unsigned int sparc_mov_g5_o7 = 0x9e100005;
1287
1288 // Write out the PLT.
1289
1290 template<int size, bool big_endian>
1291 void
1292 Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of)
1293 {
1294 const off_t offset = this->offset();
1295 const section_size_type oview_size =
1296 convert_to_section_size_type(this->data_size());
1297 unsigned char* const oview = of->get_output_view(offset, oview_size);
1298 unsigned char* pov = oview;
1299
1300 memset(pov, 0, base_plt_entry_size * 4);
1301 pov += base_plt_entry_size * 4;
1302
1303 unsigned int plt_offset = base_plt_entry_size * 4;
1304 const unsigned int count = this->count_;
1305
1306 if (size == 64)
1307 {
1308 unsigned int limit;
1309
1310 limit = (count > 32768 ? 32768 : count);
1311
1312 for (unsigned int i = 0; i < limit; ++i)
1313 {
1314 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1315 sparc_sethi_g1 + plt_offset);
1316 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1317 sparc_branch_always_pt +
1318 (((base_plt_entry_size -
1319 (plt_offset + 4)) >> 2) &
1320 0x7ffff));
1321 elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
1322 elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop);
1323 elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop);
1324 elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop);
1325 elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop);
1326 elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop);
1327
1328 pov += base_plt_entry_size;
1329 plt_offset += base_plt_entry_size;
1330 }
1331
1332 if (count > 32768)
1333 {
1334 unsigned int ext_cnt = count - 32768;
1335 unsigned int blks = ext_cnt / plt_entries_per_block;
1336
1337 for (unsigned int i = 0; i < blks; ++i)
1338 {
1339 unsigned int data_off = (plt_entries_per_block
1340 * plt_insn_chunk_size) - 4;
1341
1342 for (unsigned int j = 0; j < plt_entries_per_block; ++j)
1343 {
1344 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1345 sparc_mov_o7_g5);
1346 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1347 sparc_call_plus_8);
1348 elfcpp::Swap<32, true>::writeval(pov + 0x08,
1349 sparc_nop);
1350 elfcpp::Swap<32, true>::writeval(pov + 0x0c,
1351 sparc_ldx_o7_imm_g1 +
1352 (data_off & 0x1fff));
1353 elfcpp::Swap<32, true>::writeval(pov + 0x10,
1354 sparc_jmpl_o7_g1_g1);
1355 elfcpp::Swap<32, true>::writeval(pov + 0x14,
1356 sparc_mov_g5_o7);
1357
1358 elfcpp::Swap<64, big_endian>::writeval(
1359 pov + 0x4 + data_off,
1360 (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
1361
1362 pov += plt_insn_chunk_size;
1363 data_off -= 16;
1364 }
1365 }
1366
1367 unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block;
1368 for (unsigned int i = 0; i < sub_blk_cnt; ++i)
1369 {
1370 unsigned int data_off = (sub_blk_cnt
1371 * plt_insn_chunk_size) - 4;
1372
1373 for (unsigned int j = 0; j < plt_entries_per_block; ++j)
1374 {
1375 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1376 sparc_mov_o7_g5);
1377 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1378 sparc_call_plus_8);
1379 elfcpp::Swap<32, true>::writeval(pov + 0x08,
1380 sparc_nop);
1381 elfcpp::Swap<32, true>::writeval(pov + 0x0c,
1382 sparc_ldx_o7_imm_g1 +
1383 (data_off & 0x1fff));
1384 elfcpp::Swap<32, true>::writeval(pov + 0x10,
1385 sparc_jmpl_o7_g1_g1);
1386 elfcpp::Swap<32, true>::writeval(pov + 0x14,
1387 sparc_mov_g5_o7);
1388
1389 elfcpp::Swap<64, big_endian>::writeval(
1390 pov + 0x4 + data_off,
1391 (elfcpp::Elf_Xword) (oview - (pov + 0x04)));
1392
1393 pov += plt_insn_chunk_size;
1394 data_off -= 16;
1395 }
1396 }
1397 }
1398 }
1399 else
1400 {
1401 for (unsigned int i = 0; i < count; ++i)
1402 {
1403 elfcpp::Swap<32, true>::writeval(pov + 0x00,
1404 sparc_sethi_g1 + plt_offset);
1405 elfcpp::Swap<32, true>::writeval(pov + 0x04,
1406 sparc_branch_always +
1407 (((- (plt_offset + 4)) >> 2) &
1408 0x003fffff));
1409 elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
1410
1411 pov += base_plt_entry_size;
1412 plt_offset += base_plt_entry_size;
1413 }
1414
1415 elfcpp::Swap<32, true>::writeval(pov, sparc_nop);
1416 pov += 4;
1417 }
1418
1419 gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
1420
1421 of->write_output_view(offset, oview_size, oview);
1422 }
1423
1424 // Create a PLT entry for a global symbol.
1425
1426 template<int size, bool big_endian>
1427 void
1428 Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
1429 Layout* layout,
1430 Symbol* gsym)
1431 {
1432 if (gsym->has_plt_offset())
1433 return;
1434
1435 if (this->plt_ == NULL)
1436 {
1437 // Create the GOT sections first.
1438 this->got_section(symtab, layout);
1439
1440 // Ensure that .rela.dyn always appears before .rela.plt This is
1441 // necessary due to how, on Sparc and some other targets, .rela.dyn
1442 // needs to include .rela.plt in it's range.
1443 this->rela_dyn_section(layout);
1444
1445 this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout);
1446 layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
1447 (elfcpp::SHF_ALLOC
1448 | elfcpp::SHF_EXECINSTR
1449 | elfcpp::SHF_WRITE),
1450 this->plt_, ORDER_PLT, false);
1451
1452 // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
1453 symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
1454 Symbol_table::PREDEFINED,
1455 this->plt_,
1456 0, 0, elfcpp::STT_OBJECT,
1457 elfcpp::STB_LOCAL,
1458 elfcpp::STV_HIDDEN, 0,
1459 false, false);
1460 }
1461
1462 this->plt_->add_entry(gsym);
1463 }
1464
1465 // Return the number of entries in the PLT.
1466
1467 template<int size, bool big_endian>
1468 unsigned int
1469 Target_sparc<size, big_endian>::plt_entry_count() const
1470 {
1471 if (this->plt_ == NULL)
1472 return 0;
1473 return this->plt_->entry_count();
1474 }
1475
1476 // Return the offset of the first non-reserved PLT entry.
1477
1478 template<int size, bool big_endian>
1479 unsigned int
1480 Target_sparc<size, big_endian>::first_plt_entry_offset() const
1481 {
1482 return Output_data_plt_sparc<size, big_endian>::first_plt_entry_offset();
1483 }
1484
1485 // Return the size of each PLT entry.
1486
1487 template<int size, bool big_endian>
1488 unsigned int
1489 Target_sparc<size, big_endian>::plt_entry_size() const
1490 {
1491 return Output_data_plt_sparc<size, big_endian>::get_plt_entry_size();
1492 }
1493
1494 // Create a GOT entry for the TLS module index.
1495
1496 template<int size, bool big_endian>
1497 unsigned int
1498 Target_sparc<size, big_endian>::got_mod_index_entry(
1499 Symbol_table* symtab,
1500 Layout* layout,
1501 Sized_relobj_file<size, big_endian>* object)
1502 {
1503 if (this->got_mod_index_offset_ == -1U)
1504 {
1505 gold_assert(symtab != NULL && layout != NULL && object != NULL);
1506 Reloc_section* rela_dyn = this->rela_dyn_section(layout);
1507 Output_data_got<size, big_endian>* got;
1508 unsigned int got_offset;
1509
1510 got = this->got_section(symtab, layout);
1511 got_offset = got->add_constant(0);
1512 rela_dyn->add_local(object, 0,
1513 (size == 64 ?
1514 elfcpp::R_SPARC_TLS_DTPMOD64 :
1515 elfcpp::R_SPARC_TLS_DTPMOD32), got,
1516 got_offset, 0);
1517 got->add_constant(0);
1518 this->got_mod_index_offset_ = got_offset;
1519 }
1520 return this->got_mod_index_offset_;
1521 }
1522
1523 // Optimize the TLS relocation type based on what we know about the
1524 // symbol. IS_FINAL is true if the final address of this symbol is
1525 // known at link time.
1526
1527 static tls::Tls_optimization
1528 optimize_tls_reloc(bool is_final, int r_type)
1529 {
1530 // If we are generating a shared library, then we can't do anything
1531 // in the linker.
1532 if (parameters->options().shared())
1533 return tls::TLSOPT_NONE;
1534
1535 switch (r_type)
1536 {
1537 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
1538 case elfcpp::R_SPARC_TLS_GD_LO10:
1539 case elfcpp::R_SPARC_TLS_GD_ADD:
1540 case elfcpp::R_SPARC_TLS_GD_CALL:
1541 // These are General-Dynamic which permits fully general TLS
1542 // access. Since we know that we are generating an executable,
1543 // we can convert this to Initial-Exec. If we also know that
1544 // this is a local symbol, we can further switch to Local-Exec.
1545 if (is_final)
1546 return tls::TLSOPT_TO_LE;
1547 return tls::TLSOPT_TO_IE;
1548
1549 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
1550 case elfcpp::R_SPARC_TLS_LDM_LO10:
1551 case elfcpp::R_SPARC_TLS_LDM_ADD:
1552 case elfcpp::R_SPARC_TLS_LDM_CALL:
1553 // This is Local-Dynamic, which refers to a local symbol in the
1554 // dynamic TLS block. Since we know that we generating an
1555 // executable, we can switch to Local-Exec.
1556 return tls::TLSOPT_TO_LE;
1557
1558 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
1559 case elfcpp::R_SPARC_TLS_LDO_LOX10:
1560 case elfcpp::R_SPARC_TLS_LDO_ADD:
1561 // Another type of Local-Dynamic relocation.
1562 return tls::TLSOPT_TO_LE;
1563
1564 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
1565 case elfcpp::R_SPARC_TLS_IE_LO10:
1566 case elfcpp::R_SPARC_TLS_IE_LD:
1567 case elfcpp::R_SPARC_TLS_IE_LDX:
1568 case elfcpp::R_SPARC_TLS_IE_ADD:
1569 // These are Initial-Exec relocs which get the thread offset
1570 // from the GOT. If we know that we are linking against the
1571 // local symbol, we can switch to Local-Exec, which links the
1572 // thread offset into the instruction.
1573 if (is_final)
1574 return tls::TLSOPT_TO_LE;
1575 return tls::TLSOPT_NONE;
1576
1577 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
1578 case elfcpp::R_SPARC_TLS_LE_LOX10:
1579 // When we already have Local-Exec, there is nothing further we
1580 // can do.
1581 return tls::TLSOPT_NONE;
1582
1583 default:
1584 gold_unreachable();
1585 }
1586 }
1587
1588 // Get the Reference_flags for a particular relocation.
1589
1590 template<int size, bool big_endian>
1591 int
1592 Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type)
1593 {
1594 r_type &= 0xff;
1595 switch (r_type)
1596 {
1597 case elfcpp::R_SPARC_NONE:
1598 case elfcpp::R_SPARC_REGISTER:
1599 case elfcpp::R_SPARC_GNU_VTINHERIT:
1600 case elfcpp::R_SPARC_GNU_VTENTRY:
1601 // No symbol reference.
1602 return 0;
1603
1604 case elfcpp::R_SPARC_UA64:
1605 case elfcpp::R_SPARC_64:
1606 case elfcpp::R_SPARC_HIX22:
1607 case elfcpp::R_SPARC_LOX10:
1608 case elfcpp::R_SPARC_H44:
1609 case elfcpp::R_SPARC_M44:
1610 case elfcpp::R_SPARC_L44:
1611 case elfcpp::R_SPARC_HH22:
1612 case elfcpp::R_SPARC_HM10:
1613 case elfcpp::R_SPARC_LM22:
1614 case elfcpp::R_SPARC_HI22:
1615 case elfcpp::R_SPARC_LO10:
1616 case elfcpp::R_SPARC_OLO10:
1617 case elfcpp::R_SPARC_UA32:
1618 case elfcpp::R_SPARC_32:
1619 case elfcpp::R_SPARC_UA16:
1620 case elfcpp::R_SPARC_16:
1621 case elfcpp::R_SPARC_11:
1622 case elfcpp::R_SPARC_10:
1623 case elfcpp::R_SPARC_8:
1624 case elfcpp::R_SPARC_7:
1625 case elfcpp::R_SPARC_6:
1626 case elfcpp::R_SPARC_5:
1627 return Symbol::ABSOLUTE_REF;
1628
1629 case elfcpp::R_SPARC_DISP8:
1630 case elfcpp::R_SPARC_DISP16:
1631 case elfcpp::R_SPARC_DISP32:
1632 case elfcpp::R_SPARC_DISP64:
1633 case elfcpp::R_SPARC_PC_HH22:
1634 case elfcpp::R_SPARC_PC_HM10:
1635 case elfcpp::R_SPARC_PC_LM22:
1636 case elfcpp::R_SPARC_PC10:
1637 case elfcpp::R_SPARC_PC22:
1638 case elfcpp::R_SPARC_WDISP30:
1639 case elfcpp::R_SPARC_WDISP22:
1640 case elfcpp::R_SPARC_WDISP19:
1641 case elfcpp::R_SPARC_WDISP16:
1642 return Symbol::RELATIVE_REF;
1643
1644 case elfcpp::R_SPARC_PLT64:
1645 case elfcpp::R_SPARC_PLT32:
1646 case elfcpp::R_SPARC_HIPLT22:
1647 case elfcpp::R_SPARC_LOPLT10:
1648 case elfcpp::R_SPARC_PCPLT10:
1649 return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
1650
1651 case elfcpp::R_SPARC_PCPLT32:
1652 case elfcpp::R_SPARC_PCPLT22:
1653 case elfcpp::R_SPARC_WPLT30:
1654 return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
1655
1656 case elfcpp::R_SPARC_GOTDATA_OP:
1657 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
1658 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
1659 case elfcpp::R_SPARC_GOT10:
1660 case elfcpp::R_SPARC_GOT13:
1661 case elfcpp::R_SPARC_GOT22:
1662 // Absolute in GOT.
1663 return Symbol::ABSOLUTE_REF;
1664
1665 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
1666 case elfcpp::R_SPARC_TLS_GD_LO10:
1667 case elfcpp::R_SPARC_TLS_GD_ADD:
1668 case elfcpp::R_SPARC_TLS_GD_CALL:
1669 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
1670 case elfcpp::R_SPARC_TLS_LDM_LO10:
1671 case elfcpp::R_SPARC_TLS_LDM_ADD:
1672 case elfcpp::R_SPARC_TLS_LDM_CALL:
1673 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
1674 case elfcpp::R_SPARC_TLS_LDO_LOX10:
1675 case elfcpp::R_SPARC_TLS_LDO_ADD:
1676 case elfcpp::R_SPARC_TLS_LE_HIX22:
1677 case elfcpp::R_SPARC_TLS_LE_LOX10:
1678 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
1679 case elfcpp::R_SPARC_TLS_IE_LO10:
1680 case elfcpp::R_SPARC_TLS_IE_LD:
1681 case elfcpp::R_SPARC_TLS_IE_LDX:
1682 case elfcpp::R_SPARC_TLS_IE_ADD:
1683 return Symbol::TLS_REF;
1684
1685 case elfcpp::R_SPARC_COPY:
1686 case elfcpp::R_SPARC_GLOB_DAT:
1687 case elfcpp::R_SPARC_JMP_SLOT:
1688 case elfcpp::R_SPARC_RELATIVE:
1689 case elfcpp::R_SPARC_TLS_DTPMOD64:
1690 case elfcpp::R_SPARC_TLS_DTPMOD32:
1691 case elfcpp::R_SPARC_TLS_DTPOFF64:
1692 case elfcpp::R_SPARC_TLS_DTPOFF32:
1693 case elfcpp::R_SPARC_TLS_TPOFF64:
1694 case elfcpp::R_SPARC_TLS_TPOFF32:
1695 default:
1696 // Not expected. We will give an error later.
1697 return 0;
1698 }
1699 }
1700
1701 // Generate a PLT entry slot for a call to __tls_get_addr
1702 template<int size, bool big_endian>
1703 void
1704 Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab,
1705 Layout* layout,
1706 Target_sparc<size, big_endian>* target)
1707 {
1708 Symbol* gsym = target->tls_get_addr_sym(symtab);
1709
1710 target->make_plt_entry(symtab, layout, gsym);
1711 }
1712
1713 // Report an unsupported relocation against a local symbol.
1714
1715 template<int size, bool big_endian>
1716 void
1717 Target_sparc<size, big_endian>::Scan::unsupported_reloc_local(
1718 Sized_relobj_file<size, big_endian>* object,
1719 unsigned int r_type)
1720 {
1721 gold_error(_("%s: unsupported reloc %u against local symbol"),
1722 object->name().c_str(), r_type);
1723 }
1724
1725 // We are about to emit a dynamic relocation of type R_TYPE. If the
1726 // dynamic linker does not support it, issue an error.
1727
1728 template<int size, bool big_endian>
1729 void
1730 Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type)
1731 {
1732 gold_assert(r_type != elfcpp::R_SPARC_NONE);
1733
1734 if (size == 64)
1735 {
1736 switch (r_type)
1737 {
1738 // These are the relocation types supported by glibc for sparc 64-bit.
1739 case elfcpp::R_SPARC_RELATIVE:
1740 case elfcpp::R_SPARC_COPY:
1741 case elfcpp::R_SPARC_64:
1742 case elfcpp::R_SPARC_GLOB_DAT:
1743 case elfcpp::R_SPARC_JMP_SLOT:
1744 case elfcpp::R_SPARC_TLS_DTPMOD64:
1745 case elfcpp::R_SPARC_TLS_DTPOFF64:
1746 case elfcpp::R_SPARC_TLS_TPOFF64:
1747 case elfcpp::R_SPARC_TLS_LE_HIX22:
1748 case elfcpp::R_SPARC_TLS_LE_LOX10:
1749 case elfcpp::R_SPARC_8:
1750 case elfcpp::R_SPARC_16:
1751 case elfcpp::R_SPARC_DISP8:
1752 case elfcpp::R_SPARC_DISP16:
1753 case elfcpp::R_SPARC_DISP32:
1754 case elfcpp::R_SPARC_WDISP30:
1755 case elfcpp::R_SPARC_LO10:
1756 case elfcpp::R_SPARC_HI22:
1757 case elfcpp::R_SPARC_OLO10:
1758 case elfcpp::R_SPARC_H44:
1759 case elfcpp::R_SPARC_M44:
1760 case elfcpp::R_SPARC_L44:
1761 case elfcpp::R_SPARC_HH22:
1762 case elfcpp::R_SPARC_HM10:
1763 case elfcpp::R_SPARC_LM22:
1764 case elfcpp::R_SPARC_UA16:
1765 case elfcpp::R_SPARC_UA32:
1766 case elfcpp::R_SPARC_UA64:
1767 return;
1768
1769 default:
1770 break;
1771 }
1772 }
1773 else
1774 {
1775 switch (r_type)
1776 {
1777 // These are the relocation types supported by glibc for sparc 32-bit.
1778 case elfcpp::R_SPARC_RELATIVE:
1779 case elfcpp::R_SPARC_COPY:
1780 case elfcpp::R_SPARC_GLOB_DAT:
1781 case elfcpp::R_SPARC_32:
1782 case elfcpp::R_SPARC_JMP_SLOT:
1783 case elfcpp::R_SPARC_TLS_DTPMOD32:
1784 case elfcpp::R_SPARC_TLS_DTPOFF32:
1785 case elfcpp::R_SPARC_TLS_TPOFF32:
1786 case elfcpp::R_SPARC_TLS_LE_HIX22:
1787 case elfcpp::R_SPARC_TLS_LE_LOX10:
1788 case elfcpp::R_SPARC_8:
1789 case elfcpp::R_SPARC_16:
1790 case elfcpp::R_SPARC_DISP8:
1791 case elfcpp::R_SPARC_DISP16:
1792 case elfcpp::R_SPARC_DISP32:
1793 case elfcpp::R_SPARC_LO10:
1794 case elfcpp::R_SPARC_WDISP30:
1795 case elfcpp::R_SPARC_HI22:
1796 case elfcpp::R_SPARC_UA16:
1797 case elfcpp::R_SPARC_UA32:
1798 return;
1799
1800 default:
1801 break;
1802 }
1803 }
1804
1805 // This prevents us from issuing more than one error per reloc
1806 // section. But we can still wind up issuing more than one
1807 // error per object file.
1808 if (this->issued_non_pic_error_)
1809 return;
1810 gold_assert(parameters->options().output_is_position_independent());
1811 object->error(_("requires unsupported dynamic reloc; "
1812 "recompile with -fPIC"));
1813 this->issued_non_pic_error_ = true;
1814 return;
1815 }
1816
1817 // Scan a relocation for a local symbol.
1818
1819 template<int size, bool big_endian>
1820 inline void
1821 Target_sparc<size, big_endian>::Scan::local(
1822 Symbol_table* symtab,
1823 Layout* layout,
1824 Target_sparc<size, big_endian>* target,
1825 Sized_relobj_file<size, big_endian>* object,
1826 unsigned int data_shndx,
1827 Output_section* output_section,
1828 const elfcpp::Rela<size, big_endian>& reloc,
1829 unsigned int r_type,
1830 const elfcpp::Sym<size, big_endian>& lsym)
1831 {
1832 unsigned int orig_r_type = r_type;
1833
1834 r_type &= 0xff;
1835 switch (r_type)
1836 {
1837 case elfcpp::R_SPARC_NONE:
1838 case elfcpp::R_SPARC_REGISTER:
1839 case elfcpp::R_SPARC_GNU_VTINHERIT:
1840 case elfcpp::R_SPARC_GNU_VTENTRY:
1841 break;
1842
1843 case elfcpp::R_SPARC_64:
1844 case elfcpp::R_SPARC_32:
1845 // If building a shared library (or a position-independent
1846 // executable), we need to create a dynamic relocation for
1847 // this location. The relocation applied at link time will
1848 // apply the link-time value, so we flag the location with
1849 // an R_SPARC_RELATIVE relocation so the dynamic loader can
1850 // relocate it easily.
1851 if (parameters->options().output_is_position_independent())
1852 {
1853 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1854 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1855 rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE,
1856 output_section, data_shndx,
1857 reloc.get_r_offset(),
1858 reloc.get_r_addend(), false);
1859 }
1860 break;
1861
1862 case elfcpp::R_SPARC_HIX22:
1863 case elfcpp::R_SPARC_LOX10:
1864 case elfcpp::R_SPARC_H44:
1865 case elfcpp::R_SPARC_M44:
1866 case elfcpp::R_SPARC_L44:
1867 case elfcpp::R_SPARC_HH22:
1868 case elfcpp::R_SPARC_HM10:
1869 case elfcpp::R_SPARC_LM22:
1870 case elfcpp::R_SPARC_UA64:
1871 case elfcpp::R_SPARC_UA32:
1872 case elfcpp::R_SPARC_UA16:
1873 case elfcpp::R_SPARC_HI22:
1874 case elfcpp::R_SPARC_LO10:
1875 case elfcpp::R_SPARC_OLO10:
1876 case elfcpp::R_SPARC_16:
1877 case elfcpp::R_SPARC_11:
1878 case elfcpp::R_SPARC_10:
1879 case elfcpp::R_SPARC_8:
1880 case elfcpp::R_SPARC_7:
1881 case elfcpp::R_SPARC_6:
1882 case elfcpp::R_SPARC_5:
1883 // If building a shared library (or a position-independent
1884 // executable), we need to create a dynamic relocation for
1885 // this location.
1886 if (parameters->options().output_is_position_independent())
1887 {
1888 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1889 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1890
1891 check_non_pic(object, r_type);
1892 if (lsym.get_st_type() != elfcpp::STT_SECTION)
1893 {
1894 rela_dyn->add_local(object, r_sym, orig_r_type, output_section,
1895 data_shndx, reloc.get_r_offset(),
1896 reloc.get_r_addend());
1897 }
1898 else
1899 {
1900 gold_assert(lsym.get_st_value() == 0);
1901 rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type,
1902 output_section, data_shndx,
1903 reloc.get_r_offset(),
1904 reloc.get_r_addend());
1905 }
1906 }
1907 break;
1908
1909 case elfcpp::R_SPARC_WDISP30:
1910 case elfcpp::R_SPARC_WPLT30:
1911 case elfcpp::R_SPARC_WDISP22:
1912 case elfcpp::R_SPARC_WDISP19:
1913 case elfcpp::R_SPARC_WDISP16:
1914 case elfcpp::R_SPARC_DISP8:
1915 case elfcpp::R_SPARC_DISP16:
1916 case elfcpp::R_SPARC_DISP32:
1917 case elfcpp::R_SPARC_DISP64:
1918 case elfcpp::R_SPARC_PC10:
1919 case elfcpp::R_SPARC_PC22:
1920 break;
1921
1922 case elfcpp::R_SPARC_GOTDATA_OP:
1923 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
1924 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
1925 case elfcpp::R_SPARC_GOT10:
1926 case elfcpp::R_SPARC_GOT13:
1927 case elfcpp::R_SPARC_GOT22:
1928 {
1929 // The symbol requires a GOT entry.
1930 Output_data_got<size, big_endian>* got;
1931 unsigned int r_sym;
1932
1933 got = target->got_section(symtab, layout);
1934 r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1935
1936 // If we are generating a shared object, we need to add a
1937 // dynamic relocation for this symbol's GOT entry.
1938 if (parameters->options().output_is_position_independent())
1939 {
1940 if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
1941 {
1942 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
1943 unsigned int off;
1944
1945 off = got->add_constant(0);
1946 object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
1947 rela_dyn->add_local_relative(object, r_sym,
1948 elfcpp::R_SPARC_RELATIVE,
1949 got, off, 0, false);
1950 }
1951 }
1952 else
1953 got->add_local(object, r_sym, GOT_TYPE_STANDARD);
1954 }
1955 break;
1956
1957 // These are initial TLS relocs, which are expected when
1958 // linking.
1959 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
1960 case elfcpp::R_SPARC_TLS_GD_LO10:
1961 case elfcpp::R_SPARC_TLS_GD_ADD:
1962 case elfcpp::R_SPARC_TLS_GD_CALL:
1963 case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
1964 case elfcpp::R_SPARC_TLS_LDM_LO10:
1965 case elfcpp::R_SPARC_TLS_LDM_ADD:
1966 case elfcpp::R_SPARC_TLS_LDM_CALL:
1967 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
1968 case elfcpp::R_SPARC_TLS_LDO_LOX10:
1969 case elfcpp::R_SPARC_TLS_LDO_ADD:
1970 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
1971 case elfcpp::R_SPARC_TLS_IE_LO10:
1972 case elfcpp::R_SPARC_TLS_IE_LD:
1973 case elfcpp::R_SPARC_TLS_IE_LDX:
1974 case elfcpp::R_SPARC_TLS_IE_ADD:
1975 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
1976 case elfcpp::R_SPARC_TLS_LE_LOX10:
1977 {
1978 bool output_is_shared = parameters->options().shared();
1979 const tls::Tls_optimization optimized_type
1980 = optimize_tls_reloc(!output_is_shared, r_type);
1981 switch (r_type)
1982 {
1983 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
1984 case elfcpp::R_SPARC_TLS_GD_LO10:
1985 case elfcpp::R_SPARC_TLS_GD_ADD:
1986 case elfcpp::R_SPARC_TLS_GD_CALL:
1987 if (optimized_type == tls::TLSOPT_NONE)
1988 {
1989 // Create a pair of GOT entries for the module index and
1990 // dtv-relative offset.
1991 Output_data_got<size, big_endian>* got
1992 = target->got_section(symtab, layout);
1993 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
1994 unsigned int shndx = lsym.get_st_shndx();
1995 bool is_ordinary;
1996 shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
1997 if (!is_ordinary)
1998 object->error(_("local symbol %u has bad shndx %u"),
1999 r_sym, shndx);
2000 else
2001 got->add_local_pair_with_rel(object, r_sym,
2002 lsym.get_st_shndx(),
2003 GOT_TYPE_TLS_PAIR,
2004 target->rela_dyn_section(layout),
2005 (size == 64
2006 ? elfcpp::R_SPARC_TLS_DTPMOD64
2007 : elfcpp::R_SPARC_TLS_DTPMOD32),
2008 0);
2009 if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
2010 generate_tls_call(symtab, layout, target);
2011 }
2012 else if (optimized_type != tls::TLSOPT_TO_LE)
2013 unsupported_reloc_local(object, r_type);
2014 break;
2015
2016 case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
2017 case elfcpp::R_SPARC_TLS_LDM_LO10:
2018 case elfcpp::R_SPARC_TLS_LDM_ADD:
2019 case elfcpp::R_SPARC_TLS_LDM_CALL:
2020 if (optimized_type == tls::TLSOPT_NONE)
2021 {
2022 // Create a GOT entry for the module index.
2023 target->got_mod_index_entry(symtab, layout, object);
2024
2025 if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
2026 generate_tls_call(symtab, layout, target);
2027 }
2028 else if (optimized_type != tls::TLSOPT_TO_LE)
2029 unsupported_reloc_local(object, r_type);
2030 break;
2031
2032 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2033 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2034 case elfcpp::R_SPARC_TLS_LDO_ADD:
2035 break;
2036
2037 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2038 case elfcpp::R_SPARC_TLS_IE_LO10:
2039 case elfcpp::R_SPARC_TLS_IE_LD:
2040 case elfcpp::R_SPARC_TLS_IE_LDX:
2041 case elfcpp::R_SPARC_TLS_IE_ADD:
2042 layout->set_has_static_tls();
2043 if (optimized_type == tls::TLSOPT_NONE)
2044 {
2045 // Create a GOT entry for the tp-relative offset.
2046 Output_data_got<size, big_endian>* got
2047 = target->got_section(symtab, layout);
2048 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2049
2050 if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET))
2051 {
2052 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2053 unsigned int off = got->add_constant(0);
2054
2055 object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET, off);
2056
2057 rela_dyn->add_symbolless_local_addend(object, r_sym,
2058 (size == 64 ?
2059 elfcpp::R_SPARC_TLS_TPOFF64 :
2060 elfcpp::R_SPARC_TLS_TPOFF32),
2061 got, off, 0);
2062 }
2063 }
2064 else if (optimized_type != tls::TLSOPT_TO_LE)
2065 unsupported_reloc_local(object, r_type);
2066 break;
2067
2068 case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
2069 case elfcpp::R_SPARC_TLS_LE_LOX10:
2070 layout->set_has_static_tls();
2071 if (output_is_shared)
2072 {
2073 // We need to create a dynamic relocation.
2074 gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION);
2075 unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
2076 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2077 rela_dyn->add_symbolless_local_addend(object, r_sym, r_type,
2078 output_section, data_shndx,
2079 reloc.get_r_offset(), 0);
2080 }
2081 break;
2082 }
2083 }
2084 break;
2085
2086 // These are relocations which should only be seen by the
2087 // dynamic linker, and should never be seen here.
2088 case elfcpp::R_SPARC_COPY:
2089 case elfcpp::R_SPARC_GLOB_DAT:
2090 case elfcpp::R_SPARC_JMP_SLOT:
2091 case elfcpp::R_SPARC_RELATIVE:
2092 case elfcpp::R_SPARC_TLS_DTPMOD64:
2093 case elfcpp::R_SPARC_TLS_DTPMOD32:
2094 case elfcpp::R_SPARC_TLS_DTPOFF64:
2095 case elfcpp::R_SPARC_TLS_DTPOFF32:
2096 case elfcpp::R_SPARC_TLS_TPOFF64:
2097 case elfcpp::R_SPARC_TLS_TPOFF32:
2098 gold_error(_("%s: unexpected reloc %u in object file"),
2099 object->name().c_str(), r_type);
2100 break;
2101
2102 default:
2103 unsupported_reloc_local(object, r_type);
2104 break;
2105 }
2106 }
2107
2108 // Report an unsupported relocation against a global symbol.
2109
2110 template<int size, bool big_endian>
2111 void
2112 Target_sparc<size, big_endian>::Scan::unsupported_reloc_global(
2113 Sized_relobj_file<size, big_endian>* object,
2114 unsigned int r_type,
2115 Symbol* gsym)
2116 {
2117 gold_error(_("%s: unsupported reloc %u against global symbol %s"),
2118 object->name().c_str(), r_type, gsym->demangled_name().c_str());
2119 }
2120
2121 // Scan a relocation for a global symbol.
2122
2123 template<int size, bool big_endian>
2124 inline void
2125 Target_sparc<size, big_endian>::Scan::global(
2126 Symbol_table* symtab,
2127 Layout* layout,
2128 Target_sparc<size, big_endian>* target,
2129 Sized_relobj_file<size, big_endian>* object,
2130 unsigned int data_shndx,
2131 Output_section* output_section,
2132 const elfcpp::Rela<size, big_endian>& reloc,
2133 unsigned int r_type,
2134 Symbol* gsym)
2135 {
2136 unsigned int orig_r_type = r_type;
2137
2138 // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got
2139 // section. We check here to avoid creating a dynamic reloc against
2140 // _GLOBAL_OFFSET_TABLE_.
2141 if (!target->has_got_section()
2142 && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
2143 target->got_section(symtab, layout);
2144
2145 r_type &= 0xff;
2146 switch (r_type)
2147 {
2148 case elfcpp::R_SPARC_NONE:
2149 case elfcpp::R_SPARC_REGISTER:
2150 case elfcpp::R_SPARC_GNU_VTINHERIT:
2151 case elfcpp::R_SPARC_GNU_VTENTRY:
2152 break;
2153
2154 case elfcpp::R_SPARC_PLT64:
2155 case elfcpp::R_SPARC_PLT32:
2156 case elfcpp::R_SPARC_HIPLT22:
2157 case elfcpp::R_SPARC_LOPLT10:
2158 case elfcpp::R_SPARC_PCPLT32:
2159 case elfcpp::R_SPARC_PCPLT22:
2160 case elfcpp::R_SPARC_PCPLT10:
2161 case elfcpp::R_SPARC_WPLT30:
2162 // If the symbol is fully resolved, this is just a PC32 reloc.
2163 // Otherwise we need a PLT entry.
2164 if (gsym->final_value_is_known())
2165 break;
2166 // If building a shared library, we can also skip the PLT entry
2167 // if the symbol is defined in the output file and is protected
2168 // or hidden.
2169 if (gsym->is_defined()
2170 && !gsym->is_from_dynobj()
2171 && !gsym->is_preemptible())
2172 break;
2173 target->make_plt_entry(symtab, layout, gsym);
2174 break;
2175
2176 case elfcpp::R_SPARC_DISP8:
2177 case elfcpp::R_SPARC_DISP16:
2178 case elfcpp::R_SPARC_DISP32:
2179 case elfcpp::R_SPARC_DISP64:
2180 case elfcpp::R_SPARC_PC_HH22:
2181 case elfcpp::R_SPARC_PC_HM10:
2182 case elfcpp::R_SPARC_PC_LM22:
2183 case elfcpp::R_SPARC_PC10:
2184 case elfcpp::R_SPARC_PC22:
2185 case elfcpp::R_SPARC_WDISP30:
2186 case elfcpp::R_SPARC_WDISP22:
2187 case elfcpp::R_SPARC_WDISP19:
2188 case elfcpp::R_SPARC_WDISP16:
2189 {
2190 if (gsym->needs_plt_entry())
2191 target->make_plt_entry(symtab, layout, gsym);
2192 // Make a dynamic relocation if necessary.
2193 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
2194 {
2195 if (gsym->may_need_copy_reloc())
2196 {
2197 target->copy_reloc(symtab, layout, object,
2198 data_shndx, output_section, gsym,
2199 reloc);
2200 }
2201 else
2202 {
2203 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2204 check_non_pic(object, r_type);
2205 rela_dyn->add_global(gsym, orig_r_type, output_section, object,
2206 data_shndx, reloc.get_r_offset(),
2207 reloc.get_r_addend());
2208 }
2209 }
2210 }
2211 break;
2212
2213 case elfcpp::R_SPARC_UA64:
2214 case elfcpp::R_SPARC_64:
2215 case elfcpp::R_SPARC_HIX22:
2216 case elfcpp::R_SPARC_LOX10:
2217 case elfcpp::R_SPARC_H44:
2218 case elfcpp::R_SPARC_M44:
2219 case elfcpp::R_SPARC_L44:
2220 case elfcpp::R_SPARC_HH22:
2221 case elfcpp::R_SPARC_HM10:
2222 case elfcpp::R_SPARC_LM22:
2223 case elfcpp::R_SPARC_HI22:
2224 case elfcpp::R_SPARC_LO10:
2225 case elfcpp::R_SPARC_OLO10:
2226 case elfcpp::R_SPARC_UA32:
2227 case elfcpp::R_SPARC_32:
2228 case elfcpp::R_SPARC_UA16:
2229 case elfcpp::R_SPARC_16:
2230 case elfcpp::R_SPARC_11:
2231 case elfcpp::R_SPARC_10:
2232 case elfcpp::R_SPARC_8:
2233 case elfcpp::R_SPARC_7:
2234 case elfcpp::R_SPARC_6:
2235 case elfcpp::R_SPARC_5:
2236 {
2237 // Make a PLT entry if necessary.
2238 if (gsym->needs_plt_entry())
2239 {
2240 target->make_plt_entry(symtab, layout, gsym);
2241 // Since this is not a PC-relative relocation, we may be
2242 // taking the address of a function. In that case we need to
2243 // set the entry in the dynamic symbol table to the address of
2244 // the PLT entry.
2245 if (gsym->is_from_dynobj() && !parameters->options().shared())
2246 gsym->set_needs_dynsym_value();
2247 }
2248 // Make a dynamic relocation if necessary.
2249 if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
2250 {
2251 unsigned int r_off = reloc.get_r_offset();
2252
2253 // The assembler can sometimes emit unaligned relocations
2254 // for dwarf2 cfi directives.
2255 switch (r_type)
2256 {
2257 case elfcpp::R_SPARC_16:
2258 if (r_off & 0x1)
2259 orig_r_type = r_type = elfcpp::R_SPARC_UA16;
2260 break;
2261 case elfcpp::R_SPARC_32:
2262 if (r_off & 0x3)
2263 orig_r_type = r_type = elfcpp::R_SPARC_UA32;
2264 break;
2265 case elfcpp::R_SPARC_64:
2266 if (r_off & 0x7)
2267 orig_r_type = r_type = elfcpp::R_SPARC_UA64;
2268 break;
2269 case elfcpp::R_SPARC_UA16:
2270 if (!(r_off & 0x1))
2271 orig_r_type = r_type = elfcpp::R_SPARC_16;
2272 break;
2273 case elfcpp::R_SPARC_UA32:
2274 if (!(r_off & 0x3))
2275 orig_r_type = r_type = elfcpp::R_SPARC_32;
2276 break;
2277 case elfcpp::R_SPARC_UA64:
2278 if (!(r_off & 0x7))
2279 orig_r_type = r_type = elfcpp::R_SPARC_64;
2280 break;
2281 }
2282
2283 if (gsym->may_need_copy_reloc())
2284 {
2285 target->copy_reloc(symtab, layout, object,
2286 data_shndx, output_section, gsym, reloc);
2287 }
2288 else if ((r_type == elfcpp::R_SPARC_32
2289 || r_type == elfcpp::R_SPARC_64)
2290 && gsym->can_use_relative_reloc(false))
2291 {
2292 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2293 rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
2294 output_section, object,
2295 data_shndx, reloc.get_r_offset(),
2296 reloc.get_r_addend());
2297 }
2298 else
2299 {
2300 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2301
2302 check_non_pic(object, r_type);
2303 if (gsym->is_from_dynobj()
2304 || gsym->is_undefined()
2305 || gsym->is_preemptible())
2306 rela_dyn->add_global(gsym, orig_r_type, output_section,
2307 object, data_shndx,
2308 reloc.get_r_offset(),
2309 reloc.get_r_addend());
2310 else
2311 rela_dyn->add_symbolless_global_addend(gsym, orig_r_type,
2312 output_section,
2313 object, data_shndx,
2314 reloc.get_r_offset(),
2315 reloc.get_r_addend());
2316 }
2317 }
2318 }
2319 break;
2320
2321 case elfcpp::R_SPARC_GOTDATA_OP:
2322 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2323 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2324 case elfcpp::R_SPARC_GOT10:
2325 case elfcpp::R_SPARC_GOT13:
2326 case elfcpp::R_SPARC_GOT22:
2327 {
2328 // The symbol requires a GOT entry.
2329 Output_data_got<size, big_endian>* got;
2330
2331 got = target->got_section(symtab, layout);
2332 if (gsym->final_value_is_known())
2333 got->add_global(gsym, GOT_TYPE_STANDARD);
2334 else
2335 {
2336 // If this symbol is not fully resolved, we need to add a
2337 // dynamic relocation for it.
2338 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2339 if (gsym->is_from_dynobj()
2340 || gsym->is_undefined()
2341 || gsym->is_preemptible())
2342 got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn,
2343 elfcpp::R_SPARC_GLOB_DAT);
2344 else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
2345 {
2346 unsigned int off = got->add_constant(0);
2347
2348 gsym->set_got_offset(GOT_TYPE_STANDARD, off);
2349 rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
2350 got, off, 0);
2351 }
2352 }
2353 }
2354 break;
2355
2356 // These are initial tls relocs, which are expected when
2357 // linking.
2358 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2359 case elfcpp::R_SPARC_TLS_GD_LO10:
2360 case elfcpp::R_SPARC_TLS_GD_ADD:
2361 case elfcpp::R_SPARC_TLS_GD_CALL:
2362 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
2363 case elfcpp::R_SPARC_TLS_LDM_LO10:
2364 case elfcpp::R_SPARC_TLS_LDM_ADD:
2365 case elfcpp::R_SPARC_TLS_LDM_CALL:
2366 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2367 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2368 case elfcpp::R_SPARC_TLS_LDO_ADD:
2369 case elfcpp::R_SPARC_TLS_LE_HIX22:
2370 case elfcpp::R_SPARC_TLS_LE_LOX10:
2371 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2372 case elfcpp::R_SPARC_TLS_IE_LO10:
2373 case elfcpp::R_SPARC_TLS_IE_LD:
2374 case elfcpp::R_SPARC_TLS_IE_LDX:
2375 case elfcpp::R_SPARC_TLS_IE_ADD:
2376 {
2377 const bool is_final = gsym->final_value_is_known();
2378 const tls::Tls_optimization optimized_type
2379 = optimize_tls_reloc(is_final, r_type);
2380 switch (r_type)
2381 {
2382 case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
2383 case elfcpp::R_SPARC_TLS_GD_LO10:
2384 case elfcpp::R_SPARC_TLS_GD_ADD:
2385 case elfcpp::R_SPARC_TLS_GD_CALL:
2386 if (optimized_type == tls::TLSOPT_NONE)
2387 {
2388 // Create a pair of GOT entries for the module index and
2389 // dtv-relative offset.
2390 Output_data_got<size, big_endian>* got
2391 = target->got_section(symtab, layout);
2392 got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR,
2393 target->rela_dyn_section(layout),
2394 (size == 64
2395 ? elfcpp::R_SPARC_TLS_DTPMOD64
2396 : elfcpp::R_SPARC_TLS_DTPMOD32),
2397 (size == 64
2398 ? elfcpp::R_SPARC_TLS_DTPOFF64
2399 : elfcpp::R_SPARC_TLS_DTPOFF32));
2400
2401 // Emit R_SPARC_WPLT30 against "__tls_get_addr"
2402 if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
2403 generate_tls_call(symtab, layout, target);
2404 }
2405 else if (optimized_type == tls::TLSOPT_TO_IE)
2406 {
2407 // Create a GOT entry for the tp-relative offset.
2408 Output_data_got<size, big_endian>* got
2409 = target->got_section(symtab, layout);
2410 got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
2411 target->rela_dyn_section(layout),
2412 (size == 64 ?
2413 elfcpp::R_SPARC_TLS_TPOFF64 :
2414 elfcpp::R_SPARC_TLS_TPOFF32));
2415 }
2416 else if (optimized_type != tls::TLSOPT_TO_LE)
2417 unsupported_reloc_global(object, r_type, gsym);
2418 break;
2419
2420 case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
2421 case elfcpp::R_SPARC_TLS_LDM_LO10:
2422 case elfcpp::R_SPARC_TLS_LDM_ADD:
2423 case elfcpp::R_SPARC_TLS_LDM_CALL:
2424 if (optimized_type == tls::TLSOPT_NONE)
2425 {
2426 // Create a GOT entry for the module index.
2427 target->got_mod_index_entry(symtab, layout, object);
2428
2429 if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
2430 generate_tls_call(symtab, layout, target);
2431 }
2432 else if (optimized_type != tls::TLSOPT_TO_LE)
2433 unsupported_reloc_global(object, r_type, gsym);
2434 break;
2435
2436 case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
2437 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2438 case elfcpp::R_SPARC_TLS_LDO_ADD:
2439 break;
2440
2441 case elfcpp::R_SPARC_TLS_LE_HIX22:
2442 case elfcpp::R_SPARC_TLS_LE_LOX10:
2443 layout->set_has_static_tls();
2444 if (parameters->options().shared())
2445 {
2446 Reloc_section* rela_dyn = target->rela_dyn_section(layout);
2447 rela_dyn->add_symbolless_global_addend(gsym, orig_r_type,
2448 output_section, object,
2449 data_shndx, reloc.get_r_offset(),
2450 0);
2451 }
2452 break;
2453
2454 case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
2455 case elfcpp::R_SPARC_TLS_IE_LO10:
2456 case elfcpp::R_SPARC_TLS_IE_LD:
2457 case elfcpp::R_SPARC_TLS_IE_LDX:
2458 case elfcpp::R_SPARC_TLS_IE_ADD:
2459 layout->set_has_static_tls();
2460 if (optimized_type == tls::TLSOPT_NONE)
2461 {
2462 // Create a GOT entry for the tp-relative offset.
2463 Output_data_got<size, big_endian>* got
2464 = target->got_section(symtab, layout);
2465 got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
2466 target->rela_dyn_section(layout),
2467 (size == 64
2468 ? elfcpp::R_SPARC_TLS_TPOFF64
2469 : elfcpp::R_SPARC_TLS_TPOFF32));
2470 }
2471 else if (optimized_type != tls::TLSOPT_TO_LE)
2472 unsupported_reloc_global(object, r_type, gsym);
2473 break;
2474 }
2475 }
2476 break;
2477
2478 // These are relocations which should only be seen by the
2479 // dynamic linker, and should never be seen here.
2480 case elfcpp::R_SPARC_COPY:
2481 case elfcpp::R_SPARC_GLOB_DAT:
2482 case elfcpp::R_SPARC_JMP_SLOT:
2483 case elfcpp::R_SPARC_RELATIVE:
2484 case elfcpp::R_SPARC_TLS_DTPMOD64:
2485 case elfcpp::R_SPARC_TLS_DTPMOD32:
2486 case elfcpp::R_SPARC_TLS_DTPOFF64:
2487 case elfcpp::R_SPARC_TLS_DTPOFF32:
2488 case elfcpp::R_SPARC_TLS_TPOFF64:
2489 case elfcpp::R_SPARC_TLS_TPOFF32:
2490 gold_error(_("%s: unexpected reloc %u in object file"),
2491 object->name().c_str(), r_type);
2492 break;
2493
2494 default:
2495 unsupported_reloc_global(object, r_type, gsym);
2496 break;
2497 }
2498 }
2499
2500 // Process relocations for gc.
2501
2502 template<int size, bool big_endian>
2503 void
2504 Target_sparc<size, big_endian>::gc_process_relocs(
2505 Symbol_table* symtab,
2506 Layout* layout,
2507 Sized_relobj_file<size, big_endian>* object,
2508 unsigned int data_shndx,
2509 unsigned int,
2510 const unsigned char* prelocs,
2511 size_t reloc_count,
2512 Output_section* output_section,
2513 bool needs_special_offset_handling,
2514 size_t local_symbol_count,
2515 const unsigned char* plocal_symbols)
2516 {
2517 typedef Target_sparc<size, big_endian> Sparc;
2518 typedef typename Target_sparc<size, big_endian>::Scan Scan;
2519
2520 gold::gc_process_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan,
2521 typename Target_sparc::Relocatable_size_for_reloc>(
2522 symtab,
2523 layout,
2524 this,
2525 object,
2526 data_shndx,
2527 prelocs,
2528 reloc_count,
2529 output_section,
2530 needs_special_offset_handling,
2531 local_symbol_count,
2532 plocal_symbols);
2533 }
2534
2535 // Scan relocations for a section.
2536
2537 template<int size, bool big_endian>
2538 void
2539 Target_sparc<size, big_endian>::scan_relocs(
2540 Symbol_table* symtab,
2541 Layout* layout,
2542 Sized_relobj_file<size, big_endian>* object,
2543 unsigned int data_shndx,
2544 unsigned int sh_type,
2545 const unsigned char* prelocs,
2546 size_t reloc_count,
2547 Output_section* output_section,
2548 bool needs_special_offset_handling,
2549 size_t local_symbol_count,
2550 const unsigned char* plocal_symbols)
2551 {
2552 typedef Target_sparc<size, big_endian> Sparc;
2553 typedef typename Target_sparc<size, big_endian>::Scan Scan;
2554
2555 if (sh_type == elfcpp::SHT_REL)
2556 {
2557 gold_error(_("%s: unsupported REL reloc section"),
2558 object->name().c_str());
2559 return;
2560 }
2561
2562 gold::scan_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
2563 symtab,
2564 layout,
2565 this,
2566 object,
2567 data_shndx,
2568 prelocs,
2569 reloc_count,
2570 output_section,
2571 needs_special_offset_handling,
2572 local_symbol_count,
2573 plocal_symbols);
2574 }
2575
2576 // Finalize the sections.
2577
2578 template<int size, bool big_endian>
2579 void
2580 Target_sparc<size, big_endian>::do_finalize_sections(
2581 Layout* layout,
2582 const Input_objects*,
2583 Symbol_table*)
2584 {
2585 // Fill in some more dynamic tags.
2586 const Reloc_section* rel_plt = (this->plt_ == NULL
2587 ? NULL
2588 : this->plt_->rel_plt());
2589 layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
2590 this->rela_dyn_, true, true);
2591
2592 // Emit any relocs we saved in an attempt to avoid generating COPY
2593 // relocs.
2594 if (this->copy_relocs_.any_saved_relocs())
2595 this->copy_relocs_.emit(this->rela_dyn_section(layout));
2596 }
2597
2598 // Perform a relocation.
2599
2600 template<int size, bool big_endian>
2601 inline bool
2602 Target_sparc<size, big_endian>::Relocate::relocate(
2603 const Relocate_info<size, big_endian>* relinfo,
2604 Target_sparc* target,
2605 Output_section*,
2606 size_t relnum,
2607 const elfcpp::Rela<size, big_endian>& rela,
2608 unsigned int r_type,
2609 const Sized_symbol<size>* gsym,
2610 const Symbol_value<size>* psymval,
2611 unsigned char* view,
2612 typename elfcpp::Elf_types<size>::Elf_Addr address,
2613 section_size_type view_size)
2614 {
2615 r_type &= 0xff;
2616
2617 if (this->ignore_gd_add_)
2618 {
2619 if (r_type != elfcpp::R_SPARC_TLS_GD_ADD)
2620 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
2621 _("missing expected TLS relocation"));
2622 else
2623 {
2624 this->ignore_gd_add_ = false;
2625 return false;
2626 }
2627 }
2628 if (this->reloc_adjust_addr_ == view)
2629 view -= 4;
2630
2631 typedef Sparc_relocate_functions<size, big_endian> Reloc;
2632
2633 // Pick the value to use for symbols defined in shared objects.
2634 Symbol_value<size> symval;
2635 if (gsym != NULL
2636 && gsym->use_plt_offset(Scan::get_reference_flags(r_type)))
2637 {
2638 elfcpp::Elf_Xword value;
2639
2640 value = target->plt_section()->address() + gsym->plt_offset();
2641
2642 symval.set_output_value(value);
2643
2644 psymval = &symval;
2645 }
2646
2647 const Sized_relobj_file<size, big_endian>* object = relinfo->object;
2648 const elfcpp::Elf_Xword addend = rela.get_r_addend();
2649
2650 // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
2651 // pointer points to the beginning, not the end, of the table.
2652 // So we just use the plain offset.
2653 unsigned int got_offset = 0;
2654 switch (r_type)
2655 {
2656 case elfcpp::R_SPARC_GOTDATA_OP:
2657 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2658 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2659 case elfcpp::R_SPARC_GOT10:
2660 case elfcpp::R_SPARC_GOT13:
2661 case elfcpp::R_SPARC_GOT22:
2662 if (gsym != NULL)
2663 {
2664 gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
2665 got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
2666 }
2667 else
2668 {
2669 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
2670 gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
2671 got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
2672 }
2673 break;
2674
2675 default:
2676 break;
2677 }
2678
2679 switch (r_type)
2680 {
2681 case elfcpp::R_SPARC_NONE:
2682 case elfcpp::R_SPARC_REGISTER:
2683 case elfcpp::R_SPARC_GNU_VTINHERIT:
2684 case elfcpp::R_SPARC_GNU_VTENTRY:
2685 break;
2686
2687 case elfcpp::R_SPARC_8:
2688 Relocate_functions<size, big_endian>::rela8(view, object,
2689 psymval, addend);
2690 break;
2691
2692 case elfcpp::R_SPARC_16:
2693 if (rela.get_r_offset() & 0x1)
2694 {
2695 // The assembler can sometimes emit unaligned relocations
2696 // for dwarf2 cfi directives.
2697 Reloc::ua16(view, object, psymval, addend);
2698 }
2699 else
2700 Relocate_functions<size, big_endian>::rela16(view, object,
2701 psymval, addend);
2702 break;
2703
2704 case elfcpp::R_SPARC_32:
2705 if (!parameters->options().output_is_position_independent())
2706 {
2707 if (rela.get_r_offset() & 0x3)
2708 {
2709 // The assembler can sometimes emit unaligned relocations
2710 // for dwarf2 cfi directives.
2711 Reloc::ua32(view, object, psymval, addend);
2712 }
2713 else
2714 Relocate_functions<size, big_endian>::rela32(view, object,
2715 psymval, addend);
2716 }
2717 break;
2718
2719 case elfcpp::R_SPARC_DISP8:
2720 Reloc::disp8(view, object, psymval, addend, address);
2721 break;
2722
2723 case elfcpp::R_SPARC_DISP16:
2724 Reloc::disp16(view, object, psymval, addend, address);
2725 break;
2726
2727 case elfcpp::R_SPARC_DISP32:
2728 Reloc::disp32(view, object, psymval, addend, address);
2729 break;
2730
2731 case elfcpp::R_SPARC_DISP64:
2732 Reloc::disp64(view, object, psymval, addend, address);
2733 break;
2734
2735 case elfcpp::R_SPARC_WDISP30:
2736 case elfcpp::R_SPARC_WPLT30:
2737 Reloc::wdisp30(view, object, psymval, addend, address);
2738 break;
2739
2740 case elfcpp::R_SPARC_WDISP22:
2741 Reloc::wdisp22(view, object, psymval, addend, address);
2742 break;
2743
2744 case elfcpp::R_SPARC_WDISP19:
2745 Reloc::wdisp19(view, object, psymval, addend, address);
2746 break;
2747
2748 case elfcpp::R_SPARC_WDISP16:
2749 Reloc::wdisp16(view, object, psymval, addend, address);
2750 break;
2751
2752 case elfcpp::R_SPARC_HI22:
2753 Reloc::hi22(view, object, psymval, addend);
2754 break;
2755
2756 case elfcpp::R_SPARC_22:
2757 Reloc::rela32_22(view, object, psymval, addend);
2758 break;
2759
2760 case elfcpp::R_SPARC_13:
2761 Reloc::rela32_13(view, object, psymval, addend);
2762 break;
2763
2764 case elfcpp::R_SPARC_LO10:
2765 Reloc::lo10(view, object, psymval, addend);
2766 break;
2767
2768 case elfcpp::R_SPARC_GOT10:
2769 Reloc::lo10(view, got_offset, addend);
2770 break;
2771
2772 case elfcpp::R_SPARC_GOTDATA_OP:
2773 break;
2774
2775 case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
2776 case elfcpp::R_SPARC_GOT13:
2777 Reloc::rela32_13(view, got_offset, addend);
2778 break;
2779
2780 case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
2781 case elfcpp::R_SPARC_GOT22:
2782 Reloc::hi22(view, got_offset, addend);
2783 break;
2784
2785 case elfcpp::R_SPARC_PC10:
2786 Reloc::pc10(view, object, psymval, addend, address);
2787 break;
2788
2789 case elfcpp::R_SPARC_PC22:
2790 Reloc::pc22(view, object, psymval, addend, address);
2791 break;
2792
2793 case elfcpp::R_SPARC_TLS_DTPOFF32:
2794 case elfcpp::R_SPARC_UA32:
2795 Reloc::ua32(view, object, psymval, addend);
2796 break;
2797
2798 case elfcpp::R_SPARC_PLT64:
2799 Relocate_functions<size, big_endian>::rela64(view, object,
2800 psymval, addend);
2801 break;
2802
2803 case elfcpp::R_SPARC_PLT32:
2804 Relocate_functions<size, big_endian>::rela32(view, object,
2805 psymval, addend);
2806 break;
2807
2808 case elfcpp::R_SPARC_HIPLT22:
2809 Reloc::hi22(view, object, psymval, addend);
2810 break;
2811
2812 case elfcpp::R_SPARC_LOPLT10:
2813 Reloc::lo10(view, object, psymval, addend);
2814 break;
2815
2816 case elfcpp::R_SPARC_PCPLT32:
2817 Reloc::disp32(view, object, psymval, addend, address);
2818 break;
2819
2820 case elfcpp::R_SPARC_PCPLT22:
2821 Reloc::pcplt22(view, object, psymval, addend, address);
2822 break;
2823
2824 case elfcpp::R_SPARC_PCPLT10:
2825 Reloc::lo10(view, object, psymval, addend, address);
2826 break;
2827
2828 case elfcpp::R_SPARC_64:
2829 if (!parameters->options().output_is_position_independent())
2830 {
2831 if (rela.get_r_offset() & 0x7)
2832 {
2833 // The assembler can sometimes emit unaligned relocations
2834 // for dwarf2 cfi directives.
2835 Reloc::ua64(view, object, psymval, addend);
2836 }
2837 else
2838 Relocate_functions<size, big_endian>::rela64(view, object,
2839 psymval, addend);
2840 }
2841 break;
2842
2843 case elfcpp::R_SPARC_OLO10:
2844 {
2845 unsigned int addend2 = rela.get_r_info() & 0xffffffff;
2846 addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000;
2847 Reloc::olo10(view, object, psymval, addend, addend2);
2848 }
2849 break;
2850
2851 case elfcpp::R_SPARC_HH22:
2852 Reloc::hh22(view, object, psymval, addend);
2853 break;
2854
2855 case elfcpp::R_SPARC_PC_HH22:
2856 Reloc::pc_hh22(view, object, psymval, addend, address);
2857 break;
2858
2859 case elfcpp::R_SPARC_HM10:
2860 Reloc::hm10(view, object, psymval, addend);
2861 break;
2862
2863 case elfcpp::R_SPARC_PC_HM10:
2864 Reloc::pc_hm10(view, object, psymval, addend, address);
2865 break;
2866
2867 case elfcpp::R_SPARC_LM22:
2868 Reloc::hi22(view, object, psymval, addend);
2869 break;
2870
2871 case elfcpp::R_SPARC_PC_LM22:
2872 Reloc::pcplt22(view, object, psymval, addend, address);
2873 break;
2874
2875 case elfcpp::R_SPARC_11:
2876 Reloc::rela32_11(view, object, psymval, addend);
2877 break;
2878
2879 case elfcpp::R_SPARC_10:
2880 Reloc::rela32_10(view, object, psymval, addend);
2881 break;
2882
2883 case elfcpp::R_SPARC_7:
2884 Reloc::rela32_7(view, object, psymval, addend);
2885 break;
2886
2887 case elfcpp::R_SPARC_6:
2888 Reloc::rela32_6(view, object, psymval, addend);
2889 break;
2890
2891 case elfcpp::R_SPARC_5:
2892 Reloc::rela32_5(view, object, psymval, addend);
2893 break;
2894
2895 case elfcpp::R_SPARC_HIX22:
2896 Reloc::hix22(view, object, psymval, addend);
2897 break;
2898
2899 case elfcpp::R_SPARC_LOX10:
2900 Reloc::lox10(view, object, psymval, addend);
2901 break;
2902
2903 case elfcpp::R_SPARC_H44:
2904 Reloc::h44(view, object, psymval, addend);
2905 break;
2906
2907 case elfcpp::R_SPARC_M44:
2908 Reloc::m44(view, object, psymval, addend);
2909 break;
2910
2911 case elfcpp::R_SPARC_L44:
2912 Reloc::l44(view, object, psymval, addend);
2913 break;
2914
2915 case elfcpp::R_SPARC_TLS_DTPOFF64:
2916 case elfcpp::R_SPARC_UA64:
2917 Reloc::ua64(view, object, psymval, addend);
2918 break;
2919
2920 case elfcpp::R_SPARC_UA16:
2921 Reloc::ua16(view, object, psymval, addend);
2922 break;
2923
2924 case elfcpp::R_SPARC_TLS_GD_HI22:
2925 case elfcpp::R_SPARC_TLS_GD_LO10:
2926 case elfcpp::R_SPARC_TLS_GD_ADD:
2927 case elfcpp::R_SPARC_TLS_GD_CALL:
2928 case elfcpp::R_SPARC_TLS_LDM_HI22:
2929 case elfcpp::R_SPARC_TLS_LDM_LO10:
2930 case elfcpp::R_SPARC_TLS_LDM_ADD:
2931 case elfcpp::R_SPARC_TLS_LDM_CALL:
2932 case elfcpp::R_SPARC_TLS_LDO_HIX22:
2933 case elfcpp::R_SPARC_TLS_LDO_LOX10:
2934 case elfcpp::R_SPARC_TLS_LDO_ADD:
2935 case elfcpp::R_SPARC_TLS_IE_HI22:
2936 case elfcpp::R_SPARC_TLS_IE_LO10:
2937 case elfcpp::R_SPARC_TLS_IE_LD:
2938 case elfcpp::R_SPARC_TLS_IE_LDX:
2939 case elfcpp::R_SPARC_TLS_IE_ADD:
2940 case elfcpp::R_SPARC_TLS_LE_HIX22:
2941 case elfcpp::R_SPARC_TLS_LE_LOX10:
2942 this->relocate_tls(relinfo, target, relnum, rela,
2943 r_type, gsym, psymval, view,
2944 address, view_size);
2945 break;
2946
2947 case elfcpp::R_SPARC_COPY:
2948 case elfcpp::R_SPARC_GLOB_DAT:
2949 case elfcpp::R_SPARC_JMP_SLOT:
2950 case elfcpp::R_SPARC_RELATIVE:
2951 // These are outstanding tls relocs, which are unexpected when
2952 // linking.
2953 case elfcpp::R_SPARC_TLS_DTPMOD64:
2954 case elfcpp::R_SPARC_TLS_DTPMOD32:
2955 case elfcpp::R_SPARC_TLS_TPOFF64:
2956 case elfcpp::R_SPARC_TLS_TPOFF32:
2957 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
2958 _("unexpected reloc %u in object file"),
2959 r_type);
2960 break;
2961
2962 default:
2963 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
2964 _("unsupported reloc %u"),
2965 r_type);
2966 break;
2967 }
2968
2969 return true;
2970 }
2971
2972 // Perform a TLS relocation.
2973
2974 template<int size, bool big_endian>
2975 inline void
2976 Target_sparc<size, big_endian>::Relocate::relocate_tls(
2977 const Relocate_info<size, big_endian>* relinfo,
2978 Target_sparc<size, big_endian>* target,
2979 size_t relnum,
2980 const elfcpp::Rela<size, big_endian>& rela,
2981 unsigned int r_type,
2982 const Sized_symbol<size>* gsym,
2983 const Symbol_value<size>* psymval,
2984 unsigned char* view,
2985 typename elfcpp::Elf_types<size>::Elf_Addr address,
2986 section_size_type)
2987 {
2988 Output_segment* tls_segment = relinfo->layout->tls_segment();
2989 typedef Sparc_relocate_functions<size, big_endian> Reloc;
2990 const Sized_relobj_file<size, big_endian>* object = relinfo->object;
2991 typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
2992
2993 const elfcpp::Elf_Xword addend = rela.get_r_addend();
2994 typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0);
2995
2996 const bool is_final =
2997 (gsym == NULL
2998 ? !parameters->options().output_is_position_independent()
2999 : gsym->final_value_is_known());
3000 const tls::Tls_optimization optimized_type
3001 = optimize_tls_reloc(is_final, r_type);
3002
3003 switch (r_type)
3004 {
3005 case elfcpp::R_SPARC_TLS_GD_HI22:
3006 case elfcpp::R_SPARC_TLS_GD_LO10:
3007 case elfcpp::R_SPARC_TLS_GD_ADD:
3008 case elfcpp::R_SPARC_TLS_GD_CALL:
3009 if (optimized_type == tls::TLSOPT_TO_LE)
3010 {
3011 Insntype* wv = reinterpret_cast<Insntype*>(view);
3012 Insntype val;
3013
3014 value -= tls_segment->memsz();
3015
3016 switch (r_type)
3017 {
3018 case elfcpp::R_SPARC_TLS_GD_HI22:
3019 // TLS_GD_HI22 --> TLS_LE_HIX22
3020 Reloc::hix22(view, value, addend);
3021 break;
3022
3023 case elfcpp::R_SPARC_TLS_GD_LO10:
3024 // TLS_GD_LO10 --> TLS_LE_LOX10
3025 Reloc::lox10(view, value, addend);
3026 break;
3027
3028 case elfcpp::R_SPARC_TLS_GD_ADD:
3029 // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3
3030 val = elfcpp::Swap<32, true>::readval(wv);
3031 val = (val & ~0x7c000) | 0x1c000;
3032 elfcpp::Swap<32, true>::writeval(wv, val);
3033 break;
3034 case elfcpp::R_SPARC_TLS_GD_CALL:
3035 // call __tls_get_addr --> nop
3036 elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
3037 break;
3038 }
3039 break;
3040 }
3041 else
3042 {
3043 unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
3044 ? GOT_TYPE_TLS_OFFSET
3045 : GOT_TYPE_TLS_PAIR);
3046 if (gsym != NULL)
3047 {
3048 gold_assert(gsym->has_got_offset(got_type));
3049 value = gsym->got_offset(got_type);
3050 }
3051 else
3052 {
3053 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
3054 gold_assert(object->local_has_got_offset(r_sym, got_type));
3055 value = object->local_got_offset(r_sym, got_type);
3056 }
3057 if (optimized_type == tls::TLSOPT_TO_IE)
3058 {
3059 Insntype* wv = reinterpret_cast<Insntype*>(view);
3060 Insntype val;
3061
3062 switch (r_type)
3063 {
3064 case elfcpp::R_SPARC_TLS_GD_HI22:
3065 // TLS_GD_HI22 --> TLS_IE_HI22
3066 Reloc::hi22(view, value, addend);
3067 break;
3068
3069 case elfcpp::R_SPARC_TLS_GD_LO10:
3070 // TLS_GD_LO10 --> TLS_IE_LO10
3071 Reloc::lo10(view, value, addend);
3072 break;
3073
3074 case elfcpp::R_SPARC_TLS_GD_ADD:
3075 // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3
3076 val = elfcpp::Swap<32, true>::readval(wv);
3077
3078 if (size == 64)
3079 val |= 0xc0580000;
3080 else
3081 val |= 0xc0000000;
3082
3083 elfcpp::Swap<32, true>::writeval(wv, val);
3084 break;
3085
3086 case elfcpp::R_SPARC_TLS_GD_CALL:
3087 // The compiler can put the TLS_GD_ADD instruction
3088 // into the delay slot of the call. If so, we need
3089 // to transpose the two instructions so that the
3090 // new sequence works properly.
3091 //
3092 // The test we use is if the instruction in the
3093 // delay slot is an add with destination register
3094 // equal to %o0
3095 val = elfcpp::Swap<32, true>::readval(wv + 1);
3096 if ((val & 0x81f80000) == 0x80000000
3097 && ((val >> 25) & 0x1f) == 0x8)
3098 {
3099 if (size == 64)
3100 val |= 0xc0580000;
3101 else
3102 val |= 0xc0000000;
3103
3104 elfcpp::Swap<32, true>::writeval(wv, val);
3105
3106 wv += 1;
3107 this->ignore_gd_add_ = true;
3108 }
3109 else
3110 {
3111 // Even if the delay slot isn't the TLS_GD_ADD
3112 // instruction, we still have to handle the case
3113 // where it sets up %o0 in some other way.
3114 elfcpp::Swap<32, true>::writeval(wv, val);
3115 wv += 1;
3116 this->reloc_adjust_addr_ = view + 4;
3117 }
3118 // call __tls_get_addr --> add %g7, %o0, %o0
3119 elfcpp::Swap<32, true>::writeval(wv, 0x9001c008);
3120 break;
3121 }
3122 break;
3123 }
3124 else if (optimized_type == tls::TLSOPT_NONE)
3125 {
3126 switch (r_type)
3127 {
3128 case elfcpp::R_SPARC_TLS_GD_HI22:
3129 Reloc::hi22(view, value, addend);
3130 break;
3131 case elfcpp::R_SPARC_TLS_GD_LO10:
3132 Reloc::lo10(view, value, addend);
3133 break;
3134 case elfcpp::R_SPARC_TLS_GD_ADD:
3135 break;
3136 case elfcpp::R_SPARC_TLS_GD_CALL:
3137 {
3138 Symbol_value<size> symval;
3139 elfcpp::Elf_Xword value;
3140 Symbol* tsym;
3141
3142 tsym = target->tls_get_addr_sym_;
3143 gold_assert(tsym);
3144 value = (target->plt_section()->address() +
3145 tsym->plt_offset());
3146 symval.set_output_value(value);
3147 Reloc::wdisp30(view, object, &symval, addend, address);
3148 }
3149 break;
3150 }
3151 break;
3152 }
3153 }
3154 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3155 _("unsupported reloc %u"),
3156 r_type);
3157 break;
3158
3159 case elfcpp::R_SPARC_TLS_LDM_HI22:
3160 case elfcpp::R_SPARC_TLS_LDM_LO10:
3161 case elfcpp::R_SPARC_TLS_LDM_ADD:
3162 case elfcpp::R_SPARC_TLS_LDM_CALL:
3163 if (optimized_type == tls::TLSOPT_TO_LE)
3164 {
3165 Insntype* wv = reinterpret_cast<Insntype*>(view);
3166
3167 switch (r_type)
3168 {
3169 case elfcpp::R_SPARC_TLS_LDM_HI22:
3170 case elfcpp::R_SPARC_TLS_LDM_LO10:
3171 case elfcpp::R_SPARC_TLS_LDM_ADD:
3172 elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
3173 break;
3174
3175 case elfcpp::R_SPARC_TLS_LDM_CALL:
3176 elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0);
3177 break;
3178 }
3179 break;
3180 }
3181 else if (optimized_type == tls::TLSOPT_NONE)
3182 {
3183 // Relocate the field with the offset of the GOT entry for
3184 // the module index.
3185 unsigned int got_offset;
3186
3187 got_offset = target->got_mod_index_entry(NULL, NULL, NULL);
3188 switch (r_type)
3189 {
3190 case elfcpp::R_SPARC_TLS_LDM_HI22:
3191 Reloc::hi22(view, got_offset, addend);
3192 break;
3193 case elfcpp::R_SPARC_TLS_LDM_LO10:
3194 Reloc::lo10(view, got_offset, addend);
3195 break;
3196 case elfcpp::R_SPARC_TLS_LDM_ADD:
3197 break;
3198 case elfcpp::R_SPARC_TLS_LDM_CALL:
3199 {
3200 Symbol_value<size> symval;
3201 elfcpp::Elf_Xword value;
3202 Symbol* tsym;
3203
3204 tsym = target->tls_get_addr_sym_;
3205 gold_assert(tsym);
3206 value = (target->plt_section()->address() +
3207 tsym->plt_offset());
3208 symval.set_output_value(value);
3209 Reloc::wdisp30(view, object, &symval, addend, address);
3210 }
3211 break;
3212 }
3213 break;
3214 }
3215 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3216 _("unsupported reloc %u"),
3217 r_type);
3218 break;
3219
3220 // These relocs can appear in debugging sections, in which case
3221 // we won't see the TLS_LDM relocs. The local_dynamic_type
3222 // field tells us this.
3223 case elfcpp::R_SPARC_TLS_LDO_HIX22:
3224 if (optimized_type == tls::TLSOPT_TO_LE)
3225 {
3226 value -= tls_segment->memsz();
3227 Reloc::hix22(view, value, addend);
3228 }
3229 else
3230 Reloc::ldo_hix22(view, value, addend);
3231 break;
3232 case elfcpp::R_SPARC_TLS_LDO_LOX10:
3233 if (optimized_type == tls::TLSOPT_TO_LE)
3234 {
3235 value -= tls_segment->memsz();
3236 Reloc::lox10(view, value, addend);
3237 }
3238 else
3239 Reloc::ldo_lox10(view, value, addend);
3240 break;
3241 case elfcpp::R_SPARC_TLS_LDO_ADD:
3242 if (optimized_type == tls::TLSOPT_TO_LE)
3243 {
3244 Insntype* wv = reinterpret_cast<Insntype*>(view);
3245 Insntype val;
3246
3247 // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3
3248 val = elfcpp::Swap<32, true>::readval(wv);
3249 val = (val & ~0x7c000) | 0x1c000;
3250 elfcpp::Swap<32, true>::writeval(wv, val);
3251 }
3252 break;
3253
3254 // When optimizing IE --> LE, the only relocation that is handled
3255 // differently is R_SPARC_TLS_IE_LD, it is rewritten from
3256 // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is
3257 // rs2 and rd are the same.
3258 case elfcpp::R_SPARC_TLS_IE_LD:
3259 case elfcpp::R_SPARC_TLS_IE_LDX:
3260 if (optimized_type == tls::TLSOPT_TO_LE)
3261 {
3262 Insntype* wv = reinterpret_cast<Insntype*>(view);
3263 Insntype val = elfcpp::Swap<32, true>::readval(wv);
3264 Insntype rs2 = val & 0x1f;
3265 Insntype rd = (val >> 25) & 0x1f;
3266
3267 if (rs2 == rd)
3268 val = sparc_nop;
3269 else
3270 val = sparc_mov | (val & 0x3e00001f);
3271
3272 elfcpp::Swap<32, true>::writeval(wv, val);
3273 }
3274 break;
3275
3276 case elfcpp::R_SPARC_TLS_IE_HI22:
3277 case elfcpp::R_SPARC_TLS_IE_LO10:
3278 if (optimized_type == tls::TLSOPT_TO_LE)
3279 {
3280 value -= tls_segment->memsz();
3281 switch (r_type)
3282 {
3283 case elfcpp::R_SPARC_TLS_IE_HI22:
3284 // IE_HI22 --> LE_HIX22
3285 Reloc::hix22(view, value, addend);
3286 break;
3287 case elfcpp::R_SPARC_TLS_IE_LO10:
3288 // IE_LO10 --> LE_LOX10
3289 Reloc::lox10(view, value, addend);
3290 break;
3291 }
3292 break;
3293 }
3294 else if (optimized_type == tls::TLSOPT_NONE)
3295 {
3296 // Relocate the field with the offset of the GOT entry for
3297 // the tp-relative offset of the symbol.
3298 if (gsym != NULL)
3299 {
3300 gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET));
3301 value = gsym->got_offset(GOT_TYPE_TLS_OFFSET);
3302 }
3303 else
3304 {
3305 unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
3306 gold_assert(object->local_has_got_offset(r_sym,
3307 GOT_TYPE_TLS_OFFSET));
3308 value = object->local_got_offset(r_sym,
3309 GOT_TYPE_TLS_OFFSET);
3310 }
3311 switch (r_type)
3312 {
3313 case elfcpp::R_SPARC_TLS_IE_HI22:
3314 Reloc::hi22(view, value, addend);
3315 break;
3316 case elfcpp::R_SPARC_TLS_IE_LO10:
3317 Reloc::lo10(view, value, addend);
3318 break;
3319 }
3320 break;
3321 }
3322 gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
3323 _("unsupported reloc %u"),
3324 r_type);
3325 break;
3326
3327 case elfcpp::R_SPARC_TLS_IE_ADD:
3328 // This seems to be mainly so that we can find the addition
3329 // instruction if there is one. There doesn't seem to be any
3330 // actual relocation to apply.
3331 break;
3332
3333 case elfcpp::R_SPARC_TLS_LE_HIX22:
3334 // If we're creating a shared library, a dynamic relocation will
3335 // have been created for this location, so do not apply it now.
3336 if (!parameters->options().shared())
3337 {
3338 value -= tls_segment->memsz();
3339 Reloc::hix22(view, value, addend);
3340 }
3341 break;
3342
3343 case elfcpp::R_SPARC_TLS_LE_LOX10:
3344 // If we're creating a shared library, a dynamic relocation will
3345 // have been created for this location, so do not apply it now.
3346 if (!parameters->options().shared())
3347 {
3348 value -= tls_segment->memsz();
3349 Reloc::lox10(view, value, addend);
3350 }
3351 break;
3352 }
3353 }
3354
3355 // Relocate section data.
3356
3357 template<int size, bool big_endian>
3358 void
3359 Target_sparc<size, big_endian>::relocate_section(
3360 const Relocate_info<size, big_endian>* relinfo,
3361 unsigned int sh_type,
3362 const unsigned char* prelocs,
3363 size_t reloc_count,
3364 Output_section* output_section,
3365 bool needs_special_offset_handling,
3366 unsigned char* view,
3367 typename elfcpp::Elf_types<size>::Elf_Addr address,
3368 section_size_type view_size,
3369 const Reloc_symbol_changes* reloc_symbol_changes)
3370 {
3371 typedef Target_sparc<size, big_endian> Sparc;
3372 typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate;
3373
3374 gold_assert(sh_type == elfcpp::SHT_RELA);
3375
3376 gold::relocate_section<size, big_endian, Sparc, elfcpp::SHT_RELA,
3377 Sparc_relocate>(
3378 relinfo,
3379 this,
3380 prelocs,
3381 reloc_count,
3382 output_section,
3383 needs_special_offset_handling,
3384 view,
3385 address,
3386 view_size,
3387 reloc_symbol_changes);
3388 }
3389
3390 // Return the size of a relocation while scanning during a relocatable
3391 // link.
3392
3393 template<int size, bool big_endian>
3394 unsigned int
3395 Target_sparc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
3396 unsigned int,
3397 Relobj*)
3398 {
3399 // We are always SHT_RELA, so we should never get here.
3400 gold_unreachable();
3401 return 0;
3402 }
3403
3404 // Scan the relocs during a relocatable link.
3405
3406 template<int size, bool big_endian>
3407 void
3408 Target_sparc<size, big_endian>::scan_relocatable_relocs(
3409 Symbol_table* symtab,
3410 Layout* layout,
3411 Sized_relobj_file<size, big_endian>* object,
3412 unsigned int data_shndx,
3413 unsigned int sh_type,
3414 const unsigned char* prelocs,
3415 size_t reloc_count,
3416 Output_section* output_section,
3417 bool needs_special_offset_handling,
3418 size_t local_symbol_count,
3419 const unsigned char* plocal_symbols,
3420 Relocatable_relocs* rr)
3421 {
3422 gold_assert(sh_type == elfcpp::SHT_RELA);
3423
3424 typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
3425 Relocatable_size_for_reloc> Scan_relocatable_relocs;
3426
3427 gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
3428 Scan_relocatable_relocs>(
3429 symtab,
3430 layout,
3431 object,
3432 data_shndx,
3433 prelocs,
3434 reloc_count,
3435 output_section,
3436 needs_special_offset_handling,
3437 local_symbol_count,
3438 plocal_symbols,
3439 rr);
3440 }
3441
3442 // Relocate a section during a relocatable link.
3443
3444 template<int size, bool big_endian>
3445 void
3446 Target_sparc<size, big_endian>::relocate_for_relocatable(
3447 const Relocate_info<size, big_endian>* relinfo,
3448 unsigned int sh_type,
3449 const unsigned char* prelocs,
3450 size_t reloc_count,
3451 Output_section* output_section,
3452 off_t offset_in_output_section,
3453 const Relocatable_relocs* rr,
3454 unsigned char* view,
3455 typename elfcpp::Elf_types<size>::Elf_Addr view_address,
3456 section_size_type view_size,
3457 unsigned char* reloc_view,
3458 section_size_type reloc_view_size)
3459 {
3460 gold_assert(sh_type == elfcpp::SHT_RELA);
3461
3462 gold::relocate_for_relocatable<size, big_endian, elfcpp::SHT_RELA>(
3463 relinfo,
3464 prelocs,
3465 reloc_count,
3466 output_section,
3467 offset_in_output_section,
3468 rr,
3469 view,
3470 view_address,
3471 view_size,
3472 reloc_view,
3473 reloc_view_size);
3474 }
3475
3476 // Return the value to use for a dynamic which requires special
3477 // treatment. This is how we support equality comparisons of function
3478 // pointers across shared library boundaries, as described in the
3479 // processor specific ABI supplement.
3480
3481 template<int size, bool big_endian>
3482 uint64_t
3483 Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
3484 {
3485 gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
3486 return this->plt_section()->address() + gsym->plt_offset();
3487 }
3488
3489 // The selector for sparc object files.
3490
3491 template<int size, bool big_endian>
3492 class Target_selector_sparc : public Target_selector
3493 {
3494 public:
3495 Target_selector_sparc()
3496 : Target_selector(elfcpp::EM_NONE, size, big_endian,
3497 (size == 64 ? "elf64-sparc" : "elf32-sparc"),
3498 (size == 64 ? "elf64_sparc" : "elf32_sparc"))
3499 { }
3500
3501 Target* do_recognize(int machine, int, int)
3502 {
3503 switch (size)
3504 {
3505 case 64:
3506 if (machine != elfcpp::EM_SPARCV9)
3507 return NULL;
3508 break;
3509
3510 case 32:
3511 if (machine != elfcpp::EM_SPARC
3512 && machine != elfcpp::EM_SPARC32PLUS)
3513 return NULL;
3514 break;
3515
3516 default:
3517 return NULL;
3518 }
3519
3520 return this->instantiate_target();
3521 }
3522
3523 Target* do_instantiate_target()
3524 { return new Target_sparc<size, big_endian>(); }
3525 };
3526
3527 Target_selector_sparc<32, true> target_selector_sparc32;
3528 Target_selector_sparc<64, true> target_selector_sparc64;
3529
3530 } // End anonymous namespace.
GDB Binutils - Deliverables
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